UNITAS 642 Brand UNITAS Caliber 642 Size 13 Function Version Hands 0,90x1,50 Stem 7040 Stem (subs.) Stem (2 pce) Balance staff 28110 Balance staff (subs.) 28716 INCA Mainspring (subs.) 1,5x11,5x0,135 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8027040723Balance staff ST -shock-absorber80228110723Balance staff, pivoted80228716