HATTORY-SEIKO 6206A Brand HATTORY-SEIKO Caliber 6206A Size Function Version Hands Stem 354-720 Stem (subs.) 354-721 Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.721Balnace cplt. -for shock-absorber310-6109840310610