Seiko 6720 Movement Details

Seiko caliber 6720 is a high grade analog quartz watch movement. Production started around 1980.
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Sub-brands: Credor
Battery:TR709SW / (Needs to be sent to CoServ for replacement.)
Accuracy:±15 seconds/month
Day / date?No
GMT / world time?No
Rate:32,768 Hz
Size / diameter:18.0mm x 13.0mm
Notes:The world's thinnest movement when it was launched in 1980.