Seiko 4R37 Movement Details

Seiko caliber 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
Rate:21,600 bph
Number of jewels:24
Lift angle:53º
Size / diameter:27.0mm
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)

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