HATTORY-SEIKO 2620B Exploded diagram Brand HATTORY-SEIKO Caliber 2620B Size Function Version Hands Stem 354-261 Stem (subs.) 354-263 (lang) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecialHATTORY-SEIKO2620B WatchpartsPart NocaliberdescriptionoriginalArtno.4060Coil -red4002- 262