Seiko 4R71 Movement Details

Seiko caliber 4R71 is an automatic (with hand winding) watch movement. Production started around 2018.
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Sub-brands: Premier
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
Stem code: 351200 (tap 10)
Balance wheel code: 310184
Mainspring code: 201083
Screw codes: 012100, 012168, 012354, 012919 (ratchet wheel screw)
Notes:Designed for use in skeleton dial watches. Also sold as NH70.
PDF guides: Technical guide : 4R71
Related movements: 4R38 4R72