Seiko 4S15 Movement Details
Seiko calibre 4S15 is a high grade automatic (with hand winding) watch movement. Production started around 1995.
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| Sub-brands: | Alpinist, King Seiko, SUS, Laurel |
| Power reserve: | 40 hours |
| Accuracy: | +25/-15 seconds/day (Seiko "C" standard) |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 28,800 bph |
| Number of jewels: | 25 |
| Lift angle: | 52º |
| Size / diameter: | 25.6mm |
| Height: | 4.17mm |
| Notes: | Same as cal. 4S12 but without a GMT hand. |
| PDF guides: | Technical guide : 4S15A |
| Related movements: | 4S12 4S25 4S35 |
Part Codes
| Stem code: | 354132 |
| Balance wheel code: | 310034 |
| Mainspring code: | 201054 |
| Screw codes: | 012121 (stud screw), 012284, 012285, 012354, 012513 (ratchet wheel screw), 012672, 012673, 012726 (case screw), 012744, 012753, 012820 |