HATTORY-SEIKO V851 Brand HATTORY-SEIKO Caliber V851 Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery Watchparts Part NocaliberdescriptionoriginalArtno.401V851Winding stem03541339840354133401V851Winding stem03511339840351133