JS20 Miyota Quartz Watch Movement is a 2 button "Stopwatch" chronograph movement with 3 hands in the center and 3 indicators. The indicator at the 3 o'clock position records 24 hours, the indicator at the 6 o'clock position records seconds (stopwatch function), and the indicator at the 9 is a 60 minute register. This is a 12 1/2 ligne movement with a dimension of 28.20 mm x 26.00 mm with a movement thickness of 4.18 mm. Total height for this movement is 6.00 mm. Hand dimensions are 120/70/17/26 (hour/minute/sweep second/indicators). 0 jewels, uses 364 battery. Use stem part number 065-505.