| Brand | Seiko |
| Caliber Number | 7002, 7002A |
| Movement Type | Automatic |
| Jewels | 17 |
| Vibrations Per Hour |
21,600 bph |
| Diameter | 27mm |
| Thickness | 4.5mm |
| Shock System | Diashock |
| Winding Direction | Bi-directional |
| Crown Location | 4:00 |
| Hacking | No |
| Functions | Date (quick set), hours, minutes, seconds |
| Country of Manufacture | Singapore |
| Known Models | 7002-700J |
This gut shot is of a Seiko caliber 7002A from a vintage Scuba Diver’s model 7002-700J (case number).
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…
