Seiko 3870 Movement Details

Seiko caliber 3870 is an analog quartz watch movement. Production was in the 1970s.
Search eBay for watches with this movement.

Battery:SR44SW / 303 (Silver oxide)
Accuracy:±10 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Rate:16,384 Hz
Development division:Suwa (Nagano)
Notes:Used in pocket watches.