Seiko 4R38 Movement Details
Seiko caliber 4R38 is an automatic (with hand winding) watch movement. Production started around 2011.
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|Power reserve:||41 hours|
|Day / date?||No|
|GMT / world time?||No|
|Number of jewels:||24|
|Size / diameter:||27.0mm|
|Stem code:||351200 (tap 10)|
|Balance wheel code:||310198|
|Screw codes:||012168, 012354, 012420, 012919 (ratchet wheel screw)|
|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|
- Seiko 4R36 -The Family In Brief [watcharama.com]