HATTORY-SEIKO 7813A Exploded diagram BrandHATTORY-SEIKOCaliber7813ASizeFunctionVersionHandsStemNL (354-781)Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryMovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO7813A WatchpartsPart NocaliberdescriptionoriginalArtno.2556Datumstern- / Datumanzeiger- Mitnehmerrad802-78198408027814000Electronic module4001-781984040017814060BCoil -red4002-782984040027828240BDay indicator spring-clip0963-7819840963781