Seiko 4R37 Movement Details
Seiko calibre 4R37 is an automatic (with hand winding) watch movement. Production started around 2011.
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| Sub-brands: | Superior, Seiko 5, Spirit |
| Power reserve: | 41 hours |
| Accuracy: | +45/-35 seconds/day |
| Day / date? | Date only |
| GMT / world time? | Yes |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 21,600 bph |
| Number of jewels: | 24 |
| Lift angle: | 53º |
| Size / diameter: | 27.0mm |
| Height: | 5.32mm |
| Notes: | Also sold as NH37. |
| PDF guides: | Technical guide : 4R37A |
| Related movements: | 4R35 4R36 4R38 4R39 |
Part Codes
| Stem code: | 351200 (tap 10) |
| Balance wheel code: | 310197 |
| Mainspring code: | 201083 |
| Screw codes: | 012168, 012354, 012420, 012485, 012919 (ratchet wheel screw) |