Seiko 4S12 Movement Details
Seiko calibre 4S12 is an automatic (with hand winding) watch movement.
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| Sub-brands: | SUS |
| Power reserve: | 40 hours |
| Accuracy: | +25/-15 seconds/day (Seiko "C" standard) |
| Day / date? | Date only |
| GMT / world time? | Yes |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 28,800 bph |
| Number of jewels: | 25 |
| Lift angle: | 52º |
| Notes: | Same as cal. 4S15 but with a GMT hand. |
| PDF guides: | |
| Related movements: | 4S15 |