HATTORY-SEIKO 10C Brand HATTORY-SEIKO Caliber 10C Size Function Version Hands Stem 351-121 Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.721Balnace cplt. -for shock-absorber310-1509840310150