Seiko 4R16 Movement Details

Seiko caliber 4R16 is an automatic watch movement produced from around 2008.

Power reserve:50 hours
Accuracy:+45/-35 seconds/day
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?No
Rate:21,600 bph
Number of jewels:22
Lift angle:53º
Size / diameter:27.0mm or 12"
Height:5.25mm
Balance wheel code: 310197
Mainspring code: 201164, 201267
Notes:Together with cal. 4R15, was intended as a replacement of the popular cal. 7S26. Also sold as NH16.
PDF guides: Technical guide for 4R15A, 4R15B, 4R16A & 4R16B
Related movements: 4R15