Seiko 7S25 Movement Details
Seiko caliber 7S25 is an automatic watch movement. Production was in the 2000s.
| Sub-brands: | Prospex |
| Power reserve: | 41 hours |
| Accuracy: | +45/-35 seconds/day |
| Day / date? | Date only |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | No |
| Rate: | 21,600 bph |
| Number of jewels: | 21 |
| Lift angle: | 53º |
| Size / diameter: | 27.0mm |
| Height: | 4.9mm |
| Notes: | The same as cal. 7S26 but without day display (date only). Note that the date wheel used for 7S25A and 7S25B is not compatible with 7S25C. |
| PDF guides: |
Technical guide
: 7S25A, 7S35A & 7S55A
Technical guide : 7S25C & 7S35C |
| Related movements: | 7S26 7S35 7S36 7S55 |
Part Codes
| Stem code: | 351260 (tap 10), 351261 (tap 10) |
| Balance wheel code: | 310020, 310197 |
| Mainspring code: | 201024, 201075, 201083 |
| Date wheel code: | 878208 (black on white), 878209 (white on black), 878270 (black on white), 878271 (white on black) |
| Screw codes: | 012123 (stud screw), 012168, 012354, 012420, 012485, 012539 (second reduction wheel screw), 012919 (ratchet wheel screw), 016705 |
Videos
Related Articles
- The 5 Forgotten Seiko Movements [romeoswatches.com]