Seiko 6R20 Movement Details

Seiko caliber 6R20 is an automatic (with hand winding) watch movement.
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Sub-brands: Premier
Power reserve:45 hours
Accuracy:+25/-15 seconds/day (Seiko "C" standard)
Day / date?Day + date
GMT / world time?No
Rate:28,800 bph
Number of jewels:29
Lift angle:52º
Size / diameter:27.4mm
Stem code: 351200 (tap 10)
Balance wheel code: 310048
Mainspring code: 201074
Notes:Has a power reserve indicator.
PDF guides: Technical guide for 6R20A & 6R21A
Related movements: 6R15 6R21