Seiko 5S21 Movement Details

Seiko caliber 5S21 is an analog quartz watch movement. Production started around 1988.
Search eBay for watches with this movement.

Sub-brands: Spirit, Dolce, Avenue
Battery:SR920SW / 371 (Silver oxide)
Accuracy:±20 seconds/month
Day / date?No
GMT / world time?No
Chronograph?No
Alarm?No
Rate:32,768 Hz
Number of jewels:7
Size / diameter:19.0mm x 22.0mm
Height:2.3mm
Stem code: 351683
Screw codes: 022411
Development division:Suwa (Nagano)
Notes:Unusually for quartz movements, this has a sweeping seconds hand.
PDF guides: Technical guide : 5S21A
Related movements: 5S42

Videos