HATTORY-SEIKO 18M Brand HATTORY-SEIKO Caliber 18M Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.721Balnace cplt. -for shock-absorber310-1809840310180