Grand Seiko Movements Archives

Grand Seiko 4420

The Grand Seiko caliber 4420 is a manual winding mechanical movement, introduced in 1967. Caliber 4420 Type Mechanical Manual Family 44GS Year 1967 Jewels 27 Bph 18,000 Complications – Technical information Japanese Grand Seiko watches with caliber 4420 Ref. 4420-9000 (Diashock) Movement: 4420Type: manualJewels: 27Bph: 18.000Case: 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 …

Grand Seiko 6246

The Grand Seiko caliber 6246, introduced in 1967, is the day/date version of the first Grand Seiko automatic movement. Caliber 6246 Type Mechanical Automatic Family 62GS Year 1967 Jewels 39 Bph 19,800 Complications Day/Date Technical information Japanese Grand Seiko watches with caliber 6246 Ref. 6246-9000 (Stainless Steel) Movement: 6246Type: automaticJewels: 39Bph: 19.800Case: stainless steel Same movement-case reference as Chronometer Seikomatic. Ref. 6246-9000 (Gold Cap) Movement: 6246Type: automaticJewels: 39Bph: 19.800Case: gold …

Grand Seiko 6245

The Grand Seiko caliber 6245, introduced in 1967, is the date-only version of the first Grand Seiko automatic movement. Caliber 6245 Type Mechanical Automatic Family 62GS Year 1967 Jewels 35 Bph 19,800 Complications Date Technical information Japanese Grand Seiko watches with caliber 6245 Ref. 6245-9000 (Stainless Steel) Movement: 6245Type: automaticJewels: 35Bph: 19.800Case: stainless steel Same movement-case reference as Chronometer Seikomatic. Ref. 6245-9000 (Gold Cap) Movement: 6245Type: automaticJewels: 35Bph: 19.800Case: gold …

Grand Seiko 430

The Grand Seiko caliber 430, later renamed 5722, is a manual winding mechanical movement, introduced in 1964 (production began in 1963) with the Grand Seiko second model, known as Self-Dater for being the first Grand Seiko with date function. There are three different versions of this movement: the 430, the 5722A and the 5722B. Caliber 430 (later renamed 5722) Type Mechanical Manual Family 57GS Year 1964 (production began in 1963) …

Grand Seiko 3180

The Grand Seiko caliber 3180, later renamed 5720, is a manual winding mechanical movement, introduced in 1960 with the Grand Seiko First model. It combined some characteristics of the movements previously developed by Seiko for the Lord Marvel and the Crown. The accuracy was +12/-3 seconds per day. Caliber 3180 (later renamed 5720) Type Mechanical Manual Family 57GS Year 1960 Jewels 25 Bph 18,000 Accuracy +12/-3 seconds per day Complications …

Grand Seiko 6146

Ref. 6146-8000 (61GAW 010) Movement: 6146Type: automaticJewels: 25Bph: 36.000Case: stainless steel Ref. 6146-8000 (61GAW 010) Movement: 6146Type: automaticJewels: 25Bph: 36.000Case: stainless steel Variant of the 6146-8000 (61GAW 010) with Grand Seiko printed on the dial. Ref. 6146-8000 (61GAW 010) Movement: 6146Type: automaticJewels: 25Bph: 36.000Case: stainless steel Ref. 6146-8000 (61GAW 010) Movement: 6146Type: automaticJewels: 25Bph: 36.000Case: 18k gold Ref. 6146-8000 (61GAW 010) Movement: 6146Type: automaticJewels: 25Bph: 36.000Case: gold cap Ref. 6146-8000 …

Grand Seiko 1964

The 19GS family is based on the Seiko 1944 caliber, the world’s first movement for women’s watches running at 36,000 bph. Ref. 1964-0010 (19GS R-100) Movement: 1964Type: manualJewels: 23Bph: 36.000Case: stainless steel Ref. 1964-0010 (19GS R-100) Movement: 1964Type: manualJewels: 23Bph: 36.000Case: gold cap Ref. 1964-0010 (19GS R-100) Movement: 1964Type: manualJewels: 23Bph: 36.000Case: PMP Ref. 1964-0020 (19GS R-101) Movement: 1964Type: manualJewels: 23Bph: 36.000Case: stainless steel Ref. 1964-0020 (19GS R-101) Movement: 1964Type: …

Grand Seiko 4522

Ref. 4522-8000 (45GSC 010) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4522-8000 (45GSC 010) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: gold cap Ref. 4522-7000 (45GSC 020) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4522-7000 (45GSC 020) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: gold cap Ref. 4522-7000 (45GSC 021) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4522-8010 (45GSC 030) Movement: 4522Type: manualJewels: 25Bph: 36.000Case: 18k gold Ref. 4522-7010 (45GSC 040) …

Grand Seiko 4520

Ref. 4520-8000 (45GS 010) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4520-8000 (45GS 010) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: gold cap Ref. 4520-7000 (45GS 020) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4520-7000 (45GS 020) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: gold cap Ref. 4520-7000 (45GS 021) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: stainless steel Ref. 4520-8010 (45GS 030) Movement: 4520Type: manualJewels: 25Bph: 36.000Case: 18k gold Ref. 4520-7010 (45GS 040) …

Grand Seiko 6145

The Grand Seiko caliber 6145 is an automatic mechanical movement, introduced in 1968. Caliber 6145 Type Mechanical Automatic Family 61GS Year 1968 Jewels 25 Bph 36,000 Complications Date Technical information Japanese Grand Seiko watches with caliber 6145 Ref. 6145-8000 (61GAC 010) Movement: 6145Type: automaticJewels: 25Bph: 36.000Case: stainless steel Ref. 6145-8000 (61GAC 010) Movement: 6145Type: automaticJewels: 25Bph: 36.000Case: stainless steel Variant of the 6145-8000 (61GAC 010) with Grand Seiko printed on …