Seiko 4R15 Movement Details
Seiko caliber 4R15 is an automatic watch movement. Production started around 2008.
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|Power reserve:||50 hours|
|Day / date?||Date only|
|GMT / world time?||No|
|Number of jewels:||22|
|Size / diameter:||27.0mm or 12"|
|Notes:||Together with cal. 4R16, was intended as a replacement of the popular cal. 7S26. Also sold as NH15. This movement is similar to cal. 4R16 but with date display only (no day).|
|PDF guides:||Technical guide : 4R15A, 4R15B, 4R16A & 4R16B|
|Balance wheel code:||310197|
|Mainspring code:||201164, 201267|