The 1E20 20 Seiko Quartz Watch Movement is a 2-hand ladies’ movement (hour and minute) measuring 4¼ lignes with dimensions of 9.00 × 9.40 mm, a thickness of 2.60 mm, and an overall height of 3.35 mm. It features hand sizes of 90/45 (hour/minute), contains 5 jewels, and operates on a 335 battery. The movement is supplied with a stem, part number 354-930, which is a 0.60 mm tap (tap 13).
