FELSA 21-27 Brand FELSA Caliber 21-27 Size 6 Function Version Hands 0,50x1,00 Stem 5017 Stem (subs.) Stem (2 pce) Balance staff 26204 / 26205 Balance staff (subs.) 26206 INCA Mainspring (subs.) 1,35x5,0x0,06 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8025017723Balance staff ST -shock-absorber80226204723Balance staff, pivoted80226206