Seiko 1428 Movement Details

Seiko caliber 1428 is an analog quartz watch movement.

Battery:SR621SW / 364 (Silver oxide)
Accuracy:±15 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Rate:32,768 Hz
Number of jewels:2
Size / diameter:15.1mm x 13.0mm
Height:3.2mm
Stem code: 351144
Development division:Daini (Kameido, Tokyo)
Notes:Has a battery life indicator function where the seconds hand moves in two-second intervals when the battery is running low. The same as cal. 1421 but with a small seconds sub-dial.
PDF guides: Technical guide for 1421A & 1428A
Parts list for 1428A
Related movements: 1400 1421