HATTORY-SEIKO 6810 Brand HATTORY-SEIKO Caliber 6810 Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.4016810Winding stem035137098403513704016810Winding stem03510689840351068