Seiko 9721 Movement Details

Seiko caliber 9721 is a high grade analog quartz watch movement. Production started around 1979.
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Sub-brands: King Quartz
Battery:SR1130SW / 390 (Silver oxide)
Accuracy:±20 seconds/year
Day / date?No
GMT / world time?No
Rate:32,768 Hz
Number of jewels:2
Size / diameter:26.0mm
Development division:Daini (Kameido, Tokyo, Japan)
Notes:Twin quartz for greater accuracy. The same as cal. 9722 but without date display.
Related movements: 9722 9723