Seiko 4R38 Movement Details
Find watches with this movement on eBay.
| Sub-brands: | Presage |
| Power reserve: | 41 hours |
| Accuracy: | +45/-35 seconds/day |
| Day / date? | No |
| GMT / world time? | No |
| Chronograph? | No |
| Hacking? | Yes |
| Rate: | 21,600 bph |
| Number of jewels: | 24 |
| Lift angle: | 53º |
| Size / diameter: | 27.0mm |
| Height: | 5.32mm |
| Notes: | Referred to by Seiko as an "open heart" caliber, because of the balance wheel being visible from the dial side. The same as cal. 4R39 but without a 24 hour indicator. Also sold as NH38. |
| PDF guides: | Technical guide : 4R38A & 4R39A |
| Related movements: | 4R35 4R36 4R37 4R39 4R71 4R72 |
Part Codes
| Stem code: | 351200 (tap 10) |
| Balance wheel code: | 310198 |
| Mainspring code: | 201083 |
| Screw codes: | 012168, 012354, 012420, 012919 (ratchet wheel screw) |
Videos
Related Articles
- Seiko 4R36 -The Family In Brief [watcharama.com]
Images
