Complete guide to vintage Grand Seiko watches

The history of Grand Seiko begins in 1960 with the introduction of the Grand Seiko Chronometer, better known today as Grand Seiko First.

Between 1960 and the first half of the 1970s, numerous models were produced, which can be divided into seven different families, based on the movements. There are seven families, and not eight as we often hear, because the caliber 3180 (renamed 5720) and the 430 (renamed 5722) are actually part, according to Seiko’s official documentation, of the same family of movements.

Grand Seiko 45GS (4522-8010), 61GS (6145-8030) and 56GS (5641-5000).

The models shown in this guide are those produced starting from the first Grand Seiko, up to the interruption of the series in the mid-70s, caused by the quartz revolution, and then resumed in 1988.

Grand Seiko 57GS

Suwa Seikosha, Manual

MovementTypeJewelsBphComplicationsTechnical information
3180/5720Manual2518.000JapaneseEnglish
430/5722AManual3518.000DateJapanese
5722BManual3519.800DateJapaneseEnglish

Grand Seiko First

Introduced in Japan on December 18 of 1960, it was the first Japanese watch to pass the rating of the Bureaux Officiels de Contrôle de la Marche des Montres. Seiko’s goal was to create the ideal watch, according to the highest standards of precision, beauty, legibility and durability.

Manufactured by Suwa Seikosha, it housed the caliber 3180 (later renamed 5720), which combined some characteristics of the movements previously developed by Seiko for the Lord Marvel and the Crown. The claimed accuracy was +12/-3 seconds per day.

The choice of the Grand Seiko logo

After lengthy debates, the Gothic font was chosen to express Grand Seiko’s respect for the long history of mechanical watchmaking.

Grand-Seiko.com

Materials

Most of the examples produced feature a case coated with a layer of 14-karat gold that is 80 microns thick (considerably thicker than common gold plating). Some examples with platinum cases were also produced, much rarer and more expensive than the previous ones. The latter are not present in the catalogs of the time, but their existence is officially confirmed by Seiko.

According to the official version, the first Grand Seiko was never produced with a steel case, and the specimens of this type that are occasionally seen on the second-hand market are almost certainly assembled watches, containing non-original or modified parts.

Different versions of the dial

Both in the gold filled examples and in those in platinum, we find different variations of the dial. In some examples, particularly in the early ones, the Grand Seiko logo located at 12 o’clock is engraved or printed, while in others (most of them) the logo is raised.

Almost all of the specimens, both gold filled and platinum case, have dials of the SD type (Special Dial), as can be seen from the symbol at 6 o’clock, but there are rare examples of AD dials.

Grand Seiko Logo
From top to bottom: raised logo, engraved logo and printed logo.
SD dial with engraved logo, grand-seiko.com

Ref. J14070 – Gold Filled

Movement: 3180
Type: manual
Jewels: 25
Bph: 18.000
Case: gold filled (14k gold, 80 micron)

Dial variations: SD, AD
Logo variations: engraved, printed, raised

Ref. J14070 – Platinum

Movement: 3180
Type: manual
Jewels: 25
Bph: 18.000
Case: platino

Dial variations: SD, AD
Logo variations: engraved, printed, raised

Grand Seiko Self Dater/Calendar

Introduced in 1963, it was the first Grand Seiko with a date complication, equipped with Seiko’s proprietary fast-forward mechanism. The watch guaranteed a water resistance of 50 meters (5 atm).

Caliber 5722A, initially called 430, runs at 18,000 bph, while the later 5722B version runs at 19,800 bph.

There are two variants of the first version, with caliber 430: one with SD dial (Special Dial), and another with AD dial (Applied Dial). The difference is that the indexes in the SD dial are in white gold.

SD (Special Dial) with white gold indexes
AD (Applied Dial)

Ref. 43999 (SD)

Movement: 430
Type: manual
Jewels: 35
Case: stainless steel

First version of the Self Dater, with SD dial.

Ref. 43999 (AD)

Movement: 430
Type: manual
Jewels: 35
Case: stainless steel

First version of the Self Dater, with AD quadrant.

Ref. 5722-9990

Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel

Model updated according to the new standards for Seiko case-movement references. “Chronometer” written on the dial.

Ref. 5722-9000

Movement: 5722
Type: manual
Jewels: 35
Case: 18k gold

Self Dater with solid gold case. “Chronometer” written on the dial.

Ref. 5722-9970

Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel

Reference commissioned by Toshiba, for employees who had completed 25 years of work in the company. Recognizable by the writing on the back of the case, the 1965 and 1966 versions had the Chronometer writing under the Seiko logo, no longer present in the 1967 and 1968 versions.

Ref. 5722-9991

Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel

Chronometer writing no longer present.

Ref. 5722-9010

Movement: 5722
Type: manual
Jewels: 35
Case: gold cap

Ref. 5722-9011

Movement: 5722
Type: manual
Jewels: 35
Case: gold cap

Ref. 5722-9001

Movement: 5722
Type: manual
Jewels: 35
Case: 18k gold

Self Dater with soilid gold case, Chronometer writing no longer present.

Grand Seiko 62GS

Suwa Seikosha, Automatic

MovementTypeJewelsBphComplicationsTechnical information
6245AAutomatic3519.800DateJapanese
6246AAutomatic3919.800Day/DateJapanese

Launched under the name of Chronometer Seikomatic, it was promoted to Grand Seiko following the introduction of the Grand Seiko Standard, which exceeded Swiss chronometric standards.

The first automatic Grand Seiko

This Grand Seiko model is the first to use an automatic movement. There are two versions of the caliber: 6245A with date, and 6246A with day and date.

Ref. 6245-9000 (Stainless Steel)

Movement: 6245
Type: automatic
Jewels: 35
Bph: 19.800
Case: stainless steel

Same movement-case reference as Chronometer Seikomatic.

Ref. 6245-9000 (Gold Cap)

Movement: 6245
Type: automatic
Jewels: 35
Bph: 19.800
Case: gold cap

Same movement-case reference as Chronometer Seikomatic.

Ref. 6245-9001 (Stainless Steel)

Movement: 6245
Type: automatic
Jewels: 35
Bph: 19.800
Case: stainless steel

Ref. 6245-9001 (Gold Cap)

Movement: 6245
Type: automatic
Jewels: 35
Bph: 19.800
Case: gold cap

Ref. 6246-9000 (Stainless Steel)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: stainless steel

Same movement-case reference as Chronometer Seikomatic.

Ref. 6246-9000 (Gold Cap)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: gold cap

Same movement-case reference as Chronometer Seikomatic.

Ref. 6246-9001 (Stainless Steel)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: stainless steel

Ref. 6246-9001 (Gold Cap)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: gold cap

Ref. 6246-9001 (Stainless Steel)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: stainless steel

Dial 9010T AD (later examples)

Ref. 6246-9001 (Gold Cap)

Movement: 6246
Type: automatic
Jewels: 39
Bph: 19.800
Case: gold cap

Dial 9010T AD (later examples)

Grand Seiko 44GS

Daini Seikosha, Manual

MovementTypeJewelsBphComplicationsTechnical information
4420BManual2718.000Japanese

The 44GS series is developed by Daini Seikosha, and is based on the movement originally introduced in 1964 with the King Seiko Chronometer (ref. 4420-9990).
Thanks to the contribution of the designer Taro Tanaka, the guidelines of the “Grammar of Design” are introduced, which will define the Grand Seiko style from that moment on.

Grammar of Design

The model with reference 4420-9000 is the first Grand Seiko to follow the guidelines of Taro Tanaka’s Grammar of Design: flat surfaces and geometrically perfect angles to best reflect light, mirror-polished faceted bezels, no distortion, recognizable cases with original designs.

Ref. 4420-9000 (Diashock)

Movement: 4420
Type: manual
Jewels: 27
Bph: 18.000
Case: stainless steel

In the first version there is the Diashock writing under the Grand Seiko brand at 6 o’clock, which will soon be replaced by the Daini logo visible in the next version, with the same case-movement reference.

Ref. 4420-9000 (Daini logo)

Movement: 4420
Type: manual
Jewels: 27
Bph: 18.000
Case: stainless steel

Version of 4420-9000 with the Daini logo on the dial.

Ref. 4420-9990

Movement: 4420
Type: manual
Jewels: 27
Bph: 18.000
Case: gold cap

It shares the same case-movement reference as the King Seiko from which the 44GS series originated. The King Seiko 4420-9990 was available in stainless steel and gold cap, while the Grand Seiko 4420-9990 appears to have only been produced in the gold cap version.

Grand Seiko 61GS

Suwa Seikosha, Automatic

MovementTypeJewelsBphComplicationsTechnical information
6145AAutomatic2536.000DateJapanese
6146AAutomatic2536.000Day/DateJapanese
6155AAutomatic2536.000DateJapanese
6156AAutomatic2536.000Day/DateJapanese
6185AAutomatic2536.000Date
6185BAutomatic2536.000Date
6186BAutomatic2536.000Day/Date

The 61GS family has the largest number of models, with a great variety of designs. All calibers in this series have a date or day/date complication.

Calibers 6145A and 6146A were within the parameters of the Grand Seiko Standard. The 6155A and 6156A were defined Superior, while the 6185A, 6185B and 6186B, adjusted to guarantee maximum accuracy, were defined V.F.A. (Very Fine Adjusted).

61GS Date (cal. 6145)

Ref. 6145-8000 (61GAC 010)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8000 (61GAC 010)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Stainless steel bracelet version of the 6145-8000 (61GAC 010).

Bracelet Ref.: 6145/46 800

Ref. 6145-8000 (61GAC 010)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: 18k gold

Ref. 6145-8000 (61GAC 010)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 6145-8000 (61GAC 030)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8020 (61GAC 040)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8020 (61GAC 042)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8030 (61GAC 051)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: 18k gold

Ref. 6145-8050 (61GAC 060)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8050 (61GAC 065)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6145-8050 (61GAC 067)

Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

61GS Day-Date (cal. 6146)

Ref. 6146-8000 (61GAW 010)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8000 (61GAW 010)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8000 (61GAW 010)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: 18k gold

Ref. 6146-8000 (61GAW 010)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 6146-8000 (61GAW 030)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8010 (61GAW 020)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: hardened stainless steel

Ref. 6146-8010 (61GAW 021)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: hardened stainless steel

Ref. 6146-8020 (61GAW 040)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8020 (61GAW 042)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8030

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Not present in any Japanese catalog. Based on the provenance of the specimens I was able to trace, I think it was a model for the Asian market (Hong Kong, Singapore, Malaysia, etc).

Ref. 6146-8030

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: 18k gold

Not present in any Japanese catalog. Based on the provenance of the specimens I was able to trace, I think it was a model for the Asian market (Hong Kong, Singapore, Malaysia, etc).

Ref. 6146-8040

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Not present in any Japanese catalog. Based on the provenance of the specimens I was able to trace, I think it was a model for the Asian market (Hong Kong, Singapore, Malaysia, etc).

Ref. 6146-8050 (61GAW 060)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8050 (61GAW 065)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8050 (61GAW 066)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6146-8050 (61GAW 067)

Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

61GS Special Date (cal. 6155)

Ref. 6155-8000 (61GCL 010)

Movement: 6155
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

61GS Special Day-Date (cal. 6156)

Ref. 6156-8010 (61GWL 020)

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: hardened stainless steel

Ref. 6156-8000/6156-8001 (61GWL 010)

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6156-8000/6156-8001 (61GWL 010)

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6156-8020 (61GWL 030)

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 6156-8030

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6156-8040 (61GWL 050/GAC050)

Movement: 6156
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

61GS V.F.A. Date (cal. 6185)

Ref. 6185-8000 (6185 014)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: AAPC

There is also a version of the dial with VFA written above the Suwa logo at 6 o’clock.

Ref. 6185-8010 (6185 024)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: AAPC


There is also a version of the dial with VFA written above the Suwa logo at 6 o’clock.

Ref. 6185-8020 (6185 030)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6185-8020 (6185 050)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6185-8021 (6185 030)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6185-7000 (6185 046)

Movement: 6185
Type: automatic
Jewels: 25
Bph: 36.000
Case: 18k gold

61GS V.F.A. Day-Date (cal. 6186)

Ref. 6186-8000 (6186 010/GAA010)

Movement: 6186
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 6186-8000 (6186 024/GAA021)

Movement: 6186
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel

Grand Seiko 45GS

Daini Seikosha, Manual

MovementTypeJewelsBphComplicationsTechnical information
4520AManual2536.000Japanese
4522AManual2536.000DateJapanese
4580AManual2536.000

The 45GS family, produced by Daini Seikosha, consists of three manually wound calibers. The “base” movements are the 4520A (no-date) and the 4522A (date), while the 4580A is the V.F.A. (Very Fine Adjusted), one of the world’s most accurate mechanical movements at the time.

45GS No-Date (cal. 4520)

Ref. 4520-8000 (45GS 010)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4520-8000 (45GS 010)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 4520-7000 (45GS 020)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4520-7000 (45GS 020)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 4520-7000 (45GS 021)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4520-8010 (45GS 030)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: 18k gold

Ref. 4520-7010 (45GS 040)

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4520-7020

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Imperial Grand Seiko.

Produced on commission for the Imperial House of Japan, according to some testimonies these watches were given to diplomats and politicians as souvenirs, delivered by the Emperor himself during some of his institutional visits abroad.

Ref. 4520-8020 (45GSN 016)*

Movement: 4520
Type: manual
Jewels: 25
Bph: 36.000
Case: 18k gold

*Seiko branded watch, but with movement from the 45GS family and GS in the ref.

45GS Date (cal. 4522)

Ref. 4522-8000 (45GSC 010)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4522-8000 (45GSC 010)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 4522-7000 (45GSC 020)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4522-7000 (45GSC 020)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: gold cap

Ref. 4522-7000 (45GSC 021)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4522-8010 (45GSC 030)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: 18k gold

Ref. 4522-7010 (45GSC 040)

Movement: 4522
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

45GS V.F.A. No-Date (cal. 4580)

Ref. 4580-7000 (4580 014)

Movement: 4580
Type: manual
Jewels: 25
Bph: 36.000
Case: hardened stainless steel

Ref. 4580-7010 (4580 020)

Movement: 4580
Type: manual
Jewels: 25
Bph: 36.000
Case: stainless steel

Ref. 4580-7020

Movement: 4580
Type: manual
Jewels: 25
Bph: 36.000

Imperial V.F.A.

Produced on commission for the Imperial House of Japan, according to some testimonies these watches were given to diplomats and politicians as souvenirs, delivered by the Emperor himself during some of his institutional visits abroad.

Grand Seiko 19GS

Daini Seikosha, Manual

MovementTypeJewelsBphComplicationsTechnical information
1964AManual2336.000
1984AManual2336.000

The 19GS family was based on the Seiko 1944 caliber, the world’s first movement for women’s watches running at 36,000 bph.

19GS No-Date (cal. 1964)

Ref. 1964-0010 (19GS R-100)

Movement: 1964
Type: manual
Jewels: 23
Bph: 36.000
Case: stainless steel

Ref. 1964-0010 (19GS R-100)

Movement: 1964
Type: manual
Jewels: 23
Bph: 36.000
Case: gold cap

Ref. 1964-0010 (19GS R-100)

Movement: 1964
Type: manual
Jewels: 23
Bph: 36.000
Case: PMP

Ref. 1964-0020 (19GS R-101)

Movement: 1964
Type: manual
Jewels: 23
Bph: 36.000
Case: stainless steel

Ref. 1964-0020 (19GS R-101)

Movement: 1964
Type: manual
Jewels: 23
Bph: 36.000
Case: PMP

19GS V.F.A. No-Date (cal. 1984)

Ref. 1984-3000 (19GS S-400)

Movement: 1984
Type: manual
Jewels: 23
Bph: 36.000
Case: stainless steel

Grand Seiko 56GS

Suwa Seikosha, Automatic

MovementTypeJewelsBphComplicationsTechnical information
5641AAutomatic2528.800Japanese
5645AAutomatic2528.800DateJapanese
5646AAutomatic2528.800Day/DateJapanese

Second in variety and number of models only to the 61GS series, the 56GS family consists of three automatic calibers: 5641A (no-date), 5645A (date) and 5646A (day/date).

56GS No-Date (cal. 5641)

Ref. 5641-5000 (56GA 046)

Movement: 5641
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

The technique used to create the dial of this watch was taken as a model for the creation of the Snowflake.

Ref. 5641-7000 (56GA 010)

Movement: 5641
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5641-7005 (56GA 010)

Movement: 5641
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

56GS Date (cal. 5645)

Ref. 5645-7010/5645-7011 (56GAC 020)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-7010/5645-7011 (56GAC 020)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-7010/5645-7011 (56GAC 020)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: gold cap

Ref. 5645-7010/5645-7011 (56GAC 021)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-7010/5645-7011 (56GAC 024)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-7000 (56GAC 010)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-5000 (56GAC 046)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

The technique used to create the dial of this watch was taken as a model for the creation of the Snowflake.

Ref. 5645-5010 (56GAC 050)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-5010 (56GAC 064)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-7005 (56GAC 010/HAS660)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Ref. 5645-8000 (56GAC 030)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-8000 (56GAC 035)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5645-8000 (56GAC 036)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Ref. 5645-8000 (56GAC 086)

Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Starlight dial.

56GS Day-Date (cal. 5646)

Ref. 5646-7010/5646-7011 (56GAW 020)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: gold cap

Ref. 5646-7010/5646-7011 (56GAW 020/GAR02S)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7010/5646-7011 (56GAW 020/GAR020)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7010/5646-7011 (56GAW 020/GAR020)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7010/5646-7011 (56GAW 021)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7010/5646-7011 (56GAW 024/GAR03E)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-5010 (56GAW 054)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-5010 (56GAW 066)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7000 (56GAW 010)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7005 (56GAW 010/HAR600)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Ref. 5646-7020 (56GAW 096)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7030 (56GAW 100/GAR08S)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-7040 (56GAW 110)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-8000 (56GAW 030)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-8000 (56GAW 035)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel

Ref. 5646-8000 (56GAW 036)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Ref. 5646-8000 (56GAW 086)

Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold

Starlight dial.

Summary of the models

FamilyRef.
57GS
Manual
Suwa
Chronometer Grand Seiko (3180/5720)
  • J14070 [Grand Seiko First]
    case: gold filled/platinum
    leather strap
    dial: SD/AD
    Grand Seiko logo: engraved/printed/raised
Grand Seiko Self Dater/Calendar (430/5722)
  • 43999 [First GS with Date]
    case: stainless steel
    leather strap
    dial: SD/AD
  • 5722-9990
    case: stainless steel
    leather strap
  • 5722-9000
    case: 18k gold
    leather strap
  • 5722-9970
    case: stainless steel
    leather strap
    Toshiba ver. 1965, 1966, 1967, 1968
  • 5722-9991
    case: stainless steel
    leather strap
  • 5722-9010
    case: gold cap
    leather strap
  • 5722-9011
    case: gold cap
    leather strap
  • 5722-9001
    case: 18k gold
    leather strap
62GS
Automatic
Suwa
Grand Seiko 62GS Date (6245)
  • 6245-9000 [1967 – First self-winding GS]
    case: stainless steel/gold cap
    leather strap
    born as Seikomatic
  • 6245-9001
    case: stainless steel/gold cap
    leather strap
Grand Seiko 62GS Day-Date (6246)
  • 6246-9000
    case: stainless steel/gold cap
    leather strap
    born as Seikomatic
  • 6246-9001
    case: stainless steel/gold cap
    leather strap
    dial: 9000TAD/9010TAD
44GS
Manual
Daini
  • 4420-9000 (44GS 020) [1967 – Grammar of Design]
    case: stainless steel
    leather strap
    dial: Diashock/Daini logo
  • 4420-9990
    case: gold cap
    leather strap
    born as King Seiko Chronometer (stainless steel/gold cap)
61GS
Automatic
Suwa
Grand Seiko 61GS Date (6145)
  • 6145-8000
    • 61GAC 010
      case: stainless steel/gold cap/18k gold
      leather strap/stainless steel bracelet (6145/46 800)
      dial: white
    • 61GAC 030
      case: stainless steel
      leather strap/stainless steel bracelet (6145/46 800)
      dial: white with cross
  • 6145-8020
    • 61GAC 040
      case: stainless steel
      stainless steel bracelet (6145 802)
      dial: white
    • 61GAC 042
      case: stainless steel
      stainless steel bracelet (6145 802)
      dial: dark blue
  • 6145-8030
    • 61GAC 051
      case: 18k gold
      leather strap
  • 6145-8050
    • 61GAC 060
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: white
    • 61GAC 065
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: blue
    • 61GAC 067
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: green
Grand Seiko 61GS Day-Date (6146)
  • 6146-8000
    • 61GAW 010
      case: stainless steel/gold cap/18k solid gold
      leather strap/stainless steel bracelet (6145/46 800)
      dial: white (logo Grand Seiko/Hi-Beat)
    • 61GAW 030
      case: stainless steel
      leather strap/stainless steel bracelet (6145/46 800)
      dial: white with cross
  • 6146-8010
    caseback: standard/Idemitsu
    • 61GAW 020
      case: hardened stainless steel
      leather strap
      faceted crystal (vertical)
    • 61GAW 021
      case: hardened stainless steel
      leather strap
      faceted crystal (pyramidal)
  • 6146-8020
    • 61GAW 040
      case: stainless steel
      stainless steel bracelet (6145 802)
      dial: white
    • 61GAW 042
      case: stainless steel
      stainless steel bracelet (6145 802)
      dial: dark blue
  • 6146-8030 [Mistery Watch]
    case: stainless steel/18k gold
    no references in official catalogs, little information available
  • 6146-8040 [Mistery Watch]
    case: stainless steel
    no references in official catalogs, little information available
  • 6146-8050
    • 61GAW 060
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: white
    • 61GAW 065
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: blue
    • 61GAW 066
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: brown
    • 61GAW 067
      case: stainless steel
      stainless steel bracelet (XAB511)
      dial: green
Grand Seiko 61GS Special Date (6155)
  • 6155-8000
    • 61GCL 010
      case: stainless steel
      leather strap/stainless steel bracelet (XAB271)
Grand Seiko 61GS Special Day-Date (6156)
  • 6156-8010
    • 61GWL 020
      case: hardened stainless steel
      leather strap
  • 6156-8000/6156-8001
    • 61GWL 010
      case: stainless steel
      leather strap/stainless steel bracelet (XAB271)
  • 6156-8020
    • 61GWL 030
      case: gold cap
      leather strap
  • 6156-8030
    case: stainless steel
  • 6156-8040
    • 61GWL 050/GAC050
      case: stainless steel
      stainless steel bracelet (XQB220)
Grand Seiko 61GS V.F.A. Date (6185)
  • 6185-8000
    • 6185 014
      case: AAPC (all aluminum palladium alloy)
      bracelet AAPC
  • 6185-8010
    • 6185 024
      case: AAPC (all aluminum palladium alloy)
      leather strap
  • 6185-8020
    • 6185 030
      case: stainless steel
      leather strap
    • 6185 050
      case: stainless steel
      leather strap
  • 6185-8021
    • 6185 030
      case: stainless steel
      leather strap
  • 6185-7000
    • 6185 046
      case: 18k gold
      leather strap
Grand Seiko 61GS V.F.A. Day-Date (6186)
  • 6186-8000
    • 6186 010/GAA010
      case: stainless steel
      leather strap
      dial: silver
    • 6186 024/GAA021
      case: stainless steel
      leather strap
      dial: blue
45GS
Manual
Daini
Grand Seiko 45GS (4520)
  • 4520-8000
    • 45GS 010
      case: stainless steel/gold cap
      leather strap
  • 4520-7000
    • 45GS 020
      case: stainless steel/gold cap
      leather strap
      dial: white
    • 45GS 021
      case: stainless steel
      leather strap
      dial: dark blue
  • 4520-8010
    • 45GS 030
      case: 18k gold
      leather strap
  • 4520-7010
    • 45GS 040
      case: stainless steel
      leather strap
  • 4520-7020 [Imperial 45GS]
    Symbol of the Japanese Imperial Family on the dial, no references in official catalogs and publications.
  • 4520-8020* [Astronomical Observatory Chronometer]
    • 45GSN-016
      case: 18k gold
      leather strap
      *Seiko branded watch, but with movement from the 45GS family and GS in the ref.
Grand Seiko 45GS Date (4522)
  • 4522-8000
    • 45GSC 010
      case: stainless steel/gold cap
      leather strap
  • 4522-7000
    • 45GSC 020
      case: stainless steel/gold cap
      leather strap
      dial: white
    • 45GSC 021
      case: stainless steel
      leather strap
      dial: dark blue
  • 4522-8010
    • 45GSC 030
      case: 18k gold
      leather strap
  • 4522-7010
    • 45GSC 040
      case: stainless steel
      leather strap
Grand Seiko 45GS V.F.A. (4580)
  • 4580-7000
    • 4580 014
      case: hardened stainless steel
      leather strap
  • 4580-7010
    • 4580 020
      case: stainless steel
      leather strap
  • 4580-7020 [Imperial V.F.A.]
    Symbol of the Japanese Imperial Family on the dial, no references in official catalogs and publications.
19GS
Manual
Daini
  • 1964-0010
    • 19GS R-100
      case: stainless steel/gold cap/PMP
      leather strap
  • 1964-0020
    • 19GS R-101
      case: stainless steel/PMP
      leather strap
  • 1984-3000
    • 19GS S-400
      case: stainless steel
      leather strap
56GS
Automatic
Suwa
Grand Seiko 56GS (5641)
  • 5641-5000
    • 56GA 046
      case: 18k gold
      leather strap
  • 5641-7000
    • 56GA 010
      case: stainless steel
      leather strap
  • 5641-7005
    • 56GA 010
      case: 18k gold
      leather strap
Grand Seiko 56GS Date (5645)
  • 5645-7010/5645-7011
    • 56GAC 020
      case: stainless steel/gold cap
      leather strap/stainless steel bracelet (XQB070)
    • 56GAC 021
      case: stainless steel
      leather strap
    • 56GAC 024
      case: stainless steel
      leather strap
  • 5645-7000
    • 56GAC 010
      case: stainless steel
      leather strap
  • 5645-5000
    • 56GAC 046
      case: 18k gold
      leather strap
  • 5645-5010
    • 56GAC 050
      case: stainless steel
      leather strap
    • 56GAC 064
      case: stainless steel
      leather strap
  • 5645-7005
    • 56GAC 010/HAS660
      case: 18k gold
      leather strap
  • 5645-8000
    • 56GAC 030
      case: stainless steel
      stainless steel bracelet (XQB040)
    • 56GAC 035
      case: stainless steel
      stainless steel bracelet (XQB040)
    • 56GAC 036
      case: 18k gold
      18k gold bracelet
  • Grand Seiko 56GS Day-Date (5646)
    • 5646-7010/5646-7011
      • 56GAW 020/GAR020
        case: stainless steel
        stainless steel bracelet (XQB011/XQB070)
        dial: white
      • 56GAW 020/GAR02S
        case: stainless steel/gold cap
        leather strap
        dial: white
      • 56GAW 021
        case: stainless steel
        leather strap
        dial: silver
      • 56GAW 024/GAR03E
        case: stainless steel
        leather strap
        dial: dark blue
    • 5646-5010
      • 56GAW 054
        case: stainless steel
        leather strap
      • 56GAW 066
        case: stainless steel
        leather strap
    • 5646-7000
      • 56GAW 010
        case: stainless steel
        leather strap
    • 5646-7005
      • 56GAW 010/HAR600
        case: 18k gold
        leather strap/18k gold bracelet
    • 5646-7020
      • 56GAW 096
        case: stainless steel
        leather strap
    • 5646-7030
      • 56GAW 100/GAR08S
        case: stainless steel
        leather strap
    • 5646-7040
      • 56GAW 110
        case: stainless steel
        leather strap
    • 5646-8000
      • 56GAW 030
        case: stainless steel
        stainless steel bracelet (XQB040)
        dial: white
      • 56GAW 035
        case: stainless steel
        stainless steel bracelet (XQB040)
        dial: dark blue
      • 56GAW 036
        case: 18k gold
        18k gold bracelet

Summary of the movements

MovementD/STypeJewelsBphComplicationsTechnical information
3180/5720SuwaManual2518.000JapaneseEnglish
430/5722ASuwaManual3518.000DateJapanese
5722BSuwaManual3519.800DateJapaneseEnglish
6245ASuwaAutomatic3519.800DateJapanese
6246ASuwaAutomatic3919.800Day/DateJapanese
4420BDainiManual2718.000Japanese
6145ASuwaAutomatic2536.000DateJapanese
6146ASuwaAutomatic2536.000Day/DateJapanese
6155ASuwaAutomatic2536.000DateJapanese
6156ASuwaAutomatic2536.000Day/DateJapanese
6185ASuwaAutomatic2536.000Date
6185BSuwaAutomatic2536.000Date
6186BSuwaAutomatic2536.000Day/Date
4520ADainiManual2536.000Japanese
4522ADainiManual2536.000DateJapanese
4580ADainiManual2536.000
1964ADainiManual2336.000
1984ADainiManual2336.000
5641ASuwaAutomatic2528.800Japanese
5645ASuwaAutomatic2528.800DateJapanese
5646ASuwaAutomatic2528.800Day/DateJapanese