Seiko 0644 Movement Details

Seiko caliber 0644 is a digital watch movement produced in the 1970s.

Sub-brands: LC
Battery:SR43W / 386 (Silver oxide)
Accuracy:±15 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Rate:32,768 Hz
Size / diameter:27.0mm
Height:8.5mm
Development division:Suwa (Nagano)
PDF guides: Technical guide for 0644A & 0664A
Related movements: 0624 0664