HATTORY-SEIKO 1320 Exploded diagram Brand HATTORY-SEIKO Caliber 1320 Size Function Version Hands Stem 351-130 Stem (subs.) 351-131 Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO1320 WatchpartsPart NocaliberdescriptionoriginalArtno.4060Coil -red4002-13098404002130