Seiko 2B31 Movement Details

Seiko caliber 2B31 is an analog quartz watch movement.

Battery:SR521SW / 379 (Silver oxide)
Accuracy:±20 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Number of jewels:1
Size / diameter:15.1mm
Height:2.4mm
Stem code: 351134
Development division:Daini (Kameido, Tokyo)
Notes:Used in ladies watches.
PDF guides: Technical guide for 2B31A
Related movements: 2B20 2B21