HATTORY-SEIKO 8620A Exploded diagram Brand HATTORY-SEIKO Caliber 8620A Size Function Version Hands Stem 351-460 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8620A Watchparts Part NocaliberdescriptionoriginalArtno.2108620Third wheel231-4609840231460405Winding stem -mouv.part351-4609840351460.8620Battery connection427146098404271460