The S. Epson Y121 quartz watch movement is a ladies’ three-hand movement with hour, minute, and second hands, using hand sizes of 110/65/20. It is a 6¾ × 8 ligne movement measuring 15.30 mm × 18.20 mm, with a movement thickness of 2.99 mm, a total height of 5.00 mm, and a height of 1.91 mm over the dial seat. Featuring nickel plates and no jewels, this movement operates on a 377 battery and is compatible with stem part numbers 354-788 (tap 90) and 354-786 (tap 80). The movement is stamped with identification mark #3.
