Seiko 2B31 Movement Details

Seiko caliber 2B31 is an analog quartz watch movement.
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Battery:SR521SW / 379 (Silver oxide)
Accuracy:±20 seconds/month
Day / date?No
GMT / world time?No
Number of jewels:1
Size / diameter:15.1mm
Development division:Daini (Kameido, Tokyo, Japan)
Notes:Used in ladies watches.
PDF guides: Technical guide : 2B31A
Related movements: 2B20 2B21

Part Codes

Stem code: 351134
Screw codes: 012064, 012495, 012818, 012819