HATTORY-SEIKO 8621A Exploded diagram Brand HATTORY-SEIKO Caliber 8621A Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO8621A WatchpartsPart NocaliberdescriptionoriginalArtno.4060Coil -red4002-460025998