Seiko 5S21 Movement Details

Thumbnail image of Seiko movement 5S21A in model 5S21-5A20 (SACW020) from 1990. Seiko caliber 5S21 is an analog quartz watch movement. Production started around 1988.
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Sub-brands: Spirit, Dolce, Avenue
Battery:SR920SW / 371 (Silver oxide)
Accuracy:±20 seconds/month
Day / date?No
GMT / world time?No
Rate:32,768 Hz
Number of jewels:7
Size / diameter:19.0mm x 22.0mm
Development division:Suwa (Nagano Prefecture, Japan)
Notes:Unusually for quartz movements, this has a sweeping seconds hand.
PDF guides: Technical guide : 5S21A
Related movements: 5S42

Part Codes

Stem code: 351683
Screw codes: 022411



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