LANCO 1721 Brand LANCO Caliber 1721 Size 17 1/2 Function Version Hands 1,40x2,05 Stem 9010 Stem (subs.) Stem (2 pce) Balance staff 36401 Balance staff (subs.) Mainspring (subs.) 1,5x16,0x0,20 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8029010721BBalnace cplt. -for shock-absorber951007211721723Balance staff ST -shock-absorber80236401