The Miyota FS20 is a 0-jewel quartz chronograph movement featuring central hour, minute, and seconds hands, three sub-dials, and a date window at 6 o’clock. Sized at 10½ ligne, it measures 23.70 mm × 22.00 mm with a movement thickness of 5.10 mm and an overall height of 6.89 mm. The sub-dials include a 24-hour indicator at 2 o’clock, a 60-second indicator at 6 o’clock, and a minute counter at 10 o’clock. Designed with slanted pushers for round cases, it uses hole sizes 120/70/17/26 (hour/minute/seconds/sub-dials), operates on a 377 battery, and requires stem part number 065-549 (tap 0.90 mm / tap 10).
