The Seiko PC20 quartz watch movement is a ladies two hand caliber with hour and minute measuring 6¾ × 8 lignes or 15.30 × 17.80 mm with a thickness of 3.15 mm and total height of 4.55 mm. This 0 jewel movement uses hand sizes 120/70 operates on a 377 battery and uses stem part number 354 122 with a 0.90 mm tap 10 thread.