6G28 20 Seiko Quartz Watch Movement is a 3 hand movement (hour/minute/small seconds). This gents movement with an outside diameter of 23.70 mm and a casing diameter of 23.30 mm with a thickness of 3.45 mm, overall movement height is 4.95 mm. The indicator for the small seconds is at the 6 o'clock position. Hand dimensions are 110/65/20 (hour / minute / small seconds). 0 jewel movement, uses 377 battery. Stem is supplied with the movement. Stem is a part number 351-177, this stem is a tap 0.90 mm (tap 10).