Seiko 4S77 Movement Details
Seiko calibre 4S77 is a high grade automatic (with hand winding) watch movement.
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| Sub-brands: | Credor |
| Power reserve: | 50 hours |
| Accuracy: | +15/-10 seconds/day (Seiko "B" standard) |
| Day / date? | Day + date |
| GMT / world time? | Yes |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 28,800 bph |
| Number of jewels: | 28 |
| Size / diameter: | 25.6mm |
| Height: | 5.38mm |
| Notes: | Has a retrograde day display. The same as cal. 4S27 but with higher grade finishing. |
| PDF guides: | Technical guide : 4S77A |
| Related movements: | 4S27 |
Part Codes
| Stem code: | 354132 |
| Balance wheel code: | 310034 |
| Mainspring code: | 201275 |
| Screw codes: | 012121 (stud screw), 012201, 012284, 012285, 012354, 012513 (ratchet wheel screw), 012672, 012673, 012726 (case screw), 012744, 012820 |