Watch Seiko Divers Srp307k1 Men?s Black
Seiko Mens Automatic Monster Analog Sport Watch (Imported) SRP307K1
(Watch with a balance wheel to regulate time and a mainspring as its source of energy. The mainspring is wound by the movement of the wearer.)
If the watch is completely stopped, manually turn the crown approximately 20 times to wind up the mainspring to start the watch.
Timekeeping Accuracy :+/- 10s/day