HATTORY-SEIKO 16A Exploded diagram BrandHATTORY-SEIKOCaliber16ASize5 1/2FunctionVersionHandsStem351-160Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO16A5 1/2