ES 50 Brand ES Caliber 50 Size Function Version Hands Stem 7056 Stem (subs.) 7065 Stem (2 pce) Balance staff 34711 Balance staff (subs.) 34713 Mainspring (subs.) 1,45x10,50x0,13 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8027056401Aufzugwelle Ersatz8027065723Balance staff ST -shock-absorber80234711723Balance staff, pivoted80234713