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 Caliber 5641
![](https://www.theseikoguy.com/media/2021/02/5641-5000_56GA-046.jpg)
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.
![](https://www.theseikoguy.com/media/2021/02/5641-7000_56GA-010.jpg)
Ref. 5641-7000 (56GA 010)
Movement: 5641
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5641-7005_56GA-010.jpg)
Ref. 5641-7005 (56GA 010)
Movement: 5641
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
56GS Date Caliber 5645
![](https://www.theseikoguy.com/media/2021/02/5645-7010_56GAC-020_ss.jpg)
Ref. 5645-7010/5645-7011 (56GAC 020)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-7010_56GAC-020_ss_brc.jpg)
Ref. 5645-7010/5645-7011 (56GAC 020)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-7010_56GAC-020_gc.jpg)
Ref. 5645-7010/5645-7011 (56GAC 020)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: gold cap
![](https://www.theseikoguy.com/media/2021/02/5645-7010_56GAC-021_ss_str.jpg)
Ref. 5645-7010/5645-7011 (56GAC 021)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-7010_56GAC-024_ss_str.jpg)
Ref. 5645-7010/5645-7011 (56GAC 024)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-7000_56GAC-010_ss.jpg)
Ref. 5645-7000 (56GAC 010)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-5000_56GAC-046.jpg)
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.
![](https://www.theseikoguy.com/media/2021/02/5645-5010_56GAC-050.jpg)
Ref. 5645-5010 (56GAC 050)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-5010_56GAC-064.jpg)
Ref. 5645-5010 (56GAC 064)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-7005_56GAC-010_18k.jpg)
Ref. 5645-7005 (56GAC 010/HAS660)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
![](https://www.theseikoguy.com/media/2021/02/5645-8000_56GAC-030.jpg)
Ref. 5645-8000 (56GAC 030)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-8000_56GAC-035.jpg)
Ref. 5645-8000 (56GAC 035)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5645-8000_56GAC-036.jpg)
Ref. 5645-8000 (56GAC 036)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
![](https://www.theseikoguy.com/media/2021/02/5645-8000_56GAC-086.jpg)
Ref. 5645-8000 (56GAC 086)
Movement: 5645
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
Starlight dial.
56GS Day-Date Caliber 5646
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-020_gc_str.jpg)
Ref. 5646-7010/5646-7011 (56GAW 020)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: gold cap
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-020_ss_str.jpg)
Ref. 5646-7010/5646-7011 (56GAW 020/GAR02S)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-020_ss_brc.jpg)
Ref. 5646-7010/5646-7011 (56GAW 020/GAR020)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-020_ss_brc2.jpg)
Ref. 5646-7010/5646-7011 (56GAW 020/GAR020)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-021_ss_str.jpg)
Ref. 5646-7010/5646-7011 (56GAW 021)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7010_56GAW-024_ss_str.jpg)
Ref. 5646-7010/5646-7011 (56GAW 024/GAR03E)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-5010_56GAW-054.jpg)
Ref. 5646-5010 (56GAW 054)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-5010_56GAW-066.jpg)
Ref. 5646-5010 (56GAW 066)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7000_56GAW-010_ss.jpg)
Ref. 5646-7000 (56GAW 010)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7005_56GAW-010_18k.jpg)
Ref. 5646-7005 (56GAW 010/HAR600)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
![](https://www.theseikoguy.com/media/2021/02/5646-7020_56GAW-096.jpg)
Ref. 5646-7020 (56GAW 096)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7030_56GAW-100.jpg)
Ref. 5646-7030 (56GAW 100/GAR08S)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-7040_56GAW-110.jpg)
Ref. 5646-7040 (56GAW 110)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2020/12/5646-8000_56GAW-030.jpg)
Ref. 5646-8000 (56GAW 030)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-8000_56GAW-035.jpg)
Ref. 5646-8000 (56GAW 035)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: stainless steel
![](https://www.theseikoguy.com/media/2021/02/5646-8000_56GAW-036.jpg)
Ref. 5646-8000 (56GAW 036)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
![](https://www.theseikoguy.com/media/2021/02/5646-8000_56GAW-086.jpg)
Ref. 5646-8000 (56GAW 086)
Movement: 5646
Type: automatic
Jewels: 25
Bph: 28.800
Case: 18k gold
Starlight dial.