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.
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
Movement | Type | Jewels | Bph | Complications | Technical information |
3180/5720 | Manual | 25 | 18.000 | – | Japanese – English |
430/5722A | Manual | 35 | 18.000 | Date | Japanese |
5722B | Manual | 35 | 19.800 | Date | Japanese – English |
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.
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.
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: platinum
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.
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
Movement | Type | Jewels | Bph | Complications | Technical information |
6245A | Automatic | 35 | 19.800 | Date | Japanese |
6246A | Automatic | 39 | 19.800 | Day/Date | Japanese |
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
Movement | Type | Jewels | Bph | Complications | Technical information |
4420B | Manual | 27 | 18.000 | – | Japanese |
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
Movement | Type | Jewels | Bph | Complications | Technical information |
6145A | Automatic | 25 | 36.000 | Date | Japanese |
6146A | Automatic | 25 | 36.000 | Day/Date | Japanese |
6155A | Automatic | 25 | 36.000 | Date | Japanese |
6156A | Automatic | 25 | 36.000 | Day/Date | Japanese |
6185A | Automatic | 25 | 36.000 | Date | – |
6185B | Automatic | 25 | 36.000 | Date | – |
6186B | Automatic | 25 | 36.000 | Day/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 Special, 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
Early production pieces have “Grand Seiko” written on the dial at 6 o’clock, instead of “Hi-Beat 36000” (see below).
Ref. 6145-8000 (61GAC 010)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Dial variant of the 6145-8000 (61GAC 010) with Grand Seiko printed at 6 o’clock, found only in the earliest pieces.
Ref. 6145-8000 (61GAC 010)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Stainless steel bracelet variant of the 6145-8000 (61GAC 010).
Bracelet: 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
Early production pieces have “Grand Seiko” written on the dial at 6 o’clock, instead of “Hi-Beat 36000” (see below).
Ref. 6145-8000 (61GAC 010)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap
Dial variant of the gold cap 6145-8000 (61GAC 010) with Grand Seiko printed at 6 o’clock, found only in the earliest pieces.
Ref. 6145-8000 (61GAC 030)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Ref. 6145-8000 (61GAC 030)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Stainless steel bracelet variant of the 6145-8000 (61GAC 030).
Bracelet: 6145/46 800
Ref. 6145-8020 (61GAC 040)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: 6145 802
Ref. 6145-8020 (61GAC 042)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: 6145 802
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
Bracelet: XAB511
Ref. 6145-8050 (61GAC 065)
Movement: 6145
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: XAB511
61GS Day-Date (cal. 6146)
Ref. 6146-8000 (61GAW 010)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Early production pieces have “Grand Seiko” written on the dial at 6 o’clock, instead of “Hi-Beat 36000” (see below).
Ref. 6146-8000 (61GAW 010)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Dial variant of the 6146-8000 (61GAW 010) with Grand Seiko printed at 6 o’clock, found only in the earliest pieces.
Ref. 6146-8000 (61GAW 010)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Stainless steel bracelet variant of the 6146-8000 (61GAW 010).
Bracelet: 6145/46 800
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 010)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap
Dial variant of the 6146-8000 (61GAW 010) with Grand Seiko printed at 6 o’clock, found only in the earliest pieces.
Ref. 6146-8000 (61GAW 030)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Ref. 6146-8000 (61GAW 030)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Stainless steel bracelet variant of the 6145-8000 (61GAW 030).
Bracelet: 6145/46 800
Ref. 6146-8009
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: gold cap
Model for the international market.
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
Bracelet: 6145 802
Ref. 6146-8020 (61GAW 042)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: 6145 802
Ref. 6146-8030
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
No mention 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
No mention 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
No mention 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
Bracelet: XAB511
Ref. 6146-8050 (61GAW 065)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: XAB511
Ref. 6146-8050 (61GAW 066)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: XAB511
Ref. 6146-8050 (61GAW 067)
Movement: 6146
Type: automatic
Jewels: 25
Bph: 36.000
Case: stainless steel
Bracelet: XAB511
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
Bracelet: XAB271
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
Bracelet: XQB220
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
Movement | Type | Jewels | Bph | Complications | Technical information |
4520A | Manual | 25 | 36.000 | – | Japanese |
4522A | Manual | 25 | 36.000 | Date | Japanese |
4580A | Manual | 25 | 36.000 | – | – |
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
Movement | Type | Jewels | Bph | Complications | Technical information |
1964A | Manual | 23 | 36.000 | – | – |
1984A | Manual | 23 | 36.000 | – | – |
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
Movement | Type | Jewels | Bph | Complications | Technical information |
5641A | Automatic | 25 | 28.800 | – | Japanese |
5645A | Automatic | 25 | 28.800 | Date | Japanese |
5646A | Automatic | 25 | 28.800 | Day/Date | Japanese |
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
Family | Ref. |
57GS Manual Suwa |
Chronometer Grand Seiko (3180/5720)
|
62GS Automatic Suwa |
Grand Seiko 62GS Date (6245)
|
44GS Manual Daini |
|
61GS Automatic Suwa |
Grand Seiko 61GS Date (6145)
|
45GS Manual Daini |
Grand Seiko 45GS (4520)
|
19GS Manual Daini |
|
56GS Automatic Suwa |
Grand Seiko 56GS (5641)
|
Summary of the movements
Movement | D/S | Type | Jewels | Bph | Complications | Technical information |
3180/5720 | Suwa | Manual | 25 | 18.000 | – | Japanese – English |
430/5722A | Suwa | Manual | 35 | 18.000 | Date | Japanese |
5722B | Suwa | Manual | 35 | 19.800 | Date | Japanese – English |
6245A | Suwa | Automatic | 35 | 19.800 | Date | Japanese |
6246A | Suwa | Automatic | 39 | 19.800 | Day/Date | Japanese |
4420B | Daini | Manual | 27 | 18.000 | – | Japanese |
6145A | Suwa | Automatic | 25 | 36.000 | Date | Japanese |
6146A | Suwa | Automatic | 25 | 36.000 | Day/Date | Japanese |
6155A | Suwa | Automatic | 25 | 36.000 | Date | Japanese |
6156A | Suwa | Automatic | 25 | 36.000 | Day/Date | Japanese |
6185A | Suwa | Automatic | 25 | 36.000 | Date | – |
6185B | Suwa | Automatic | 25 | 36.000 | Date | – |
6186B | Suwa | Automatic | 25 | 36.000 | Day/Date | – |
4520A | Daini | Manual | 25 | 36.000 | – | Japanese |
4522A | Daini | Manual | 25 | 36.000 | Date | Japanese |
4580A | Daini | Manual | 25 | 36.000 | – | – |
1964A | Daini | Manual | 23 | 36.000 | – | – |
1984A | Daini | Manual | 23 | 36.000 | – | – |
5641A | Suwa | Automatic | 25 | 28.800 | – | Japanese |
5645A | Suwa | Automatic | 25 | 28.800 | Date | Japanese |
5646A | Suwa | Automatic | 25 | 28.800 | Day/Date | Japanese |