| Brand | Seiko |
| Caliber Number | 7002, 7002A |
| Movement Type | Automatic |
| Diameter |
12”’ (27mm) |
| Thickness |
4.5mm |
| Jewels | 17 |
| Vibrations Per Hour |
21,600 bph |
| Power Reserve |
Up to 43 hours on a full charge |
| Shock System | Diashock |
| Winding System |
Seiko Magic Lever |
| Winding Direction | Bi-directional |
| Crown Location | 4:00 |
| Hacking? | No |
| Hand-Windable? |
No |
| Hand Sizes |
1.50mm / 0.90mm / 0.20mm |
| Functions | Hours, minutes, central seconds, quickset date at 3:00 |
| Country of Manufacture | Singapore |
| Known Models | 7002-700A, 7002-700J, 7002-7039, 7002-7020, 7002-7009, Sports 50 (Add yours to the comments below…) |
The Seiko caliber 7002A is an automatic movement with 17 jewels found in many pre-SKX Seiko divers. This caliber was introduced in the late 1980s after Seiko started to phase out the production of the caliber 6309 around 1988. Seiko produced the 7002 until circa 1996 – which is when the caliber 7S26 was introduced.
Power Reserve:
Without a hand-winding function, this movement can take some time to reach full power reserve. Achieve this by continuously wearing your watch and/or shaking it side to side. Once full power reserve is realized, the movement should run for approximately 40 hours, up to 43 hours continuously.
Different Versions:
From an article on Time Zone by Rob B:
Consulting the Seiko parts catalogs revealed that the cals 7002, 7005 7006 and 7009 are almost identical, sharing many parts in common. The main difference is in thickness, day/date features and jewelling. The 7005 is date only, the 7009 is a day/date and the 7002A is date only and has a different auto winding weight. Since this particular movement is a “date only”, then one concludes it started life as a 7005A, to be transfomed at a later date by whatever parts were to hand at the time…
Additional Images:
Video:
The video gut shot below is of a Seiko caliber 7002A from a vintage Scuba Diver’s model 7002-700J (case number).
Additional Resources:
Share your experience with the Seiko caliber 7002A in the comments below…
