CERTINA 15-21 Brand CERTINA Caliber 15-21 Size 6 3/4 Function SC-AUT (21 600) Version Hands 0,55x1,00 Stem 5105 Stem (subs.) Stem (2 pce) Balance staff 27617 Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.210BThird wheel220BSecond wheel -short pivot40715-20Clutch wheel91200407152044515-20Setting lever spring912004451520705BEscape wheel -pinion straigt piv.710BPallet fork -pinion 1 lower end-piec.723Balance staff ST -shock-absorber802276171143Oscillating weight912011431520152015-20Reversing wheel9120152015201520/115-20Auxilary reversing wheel912015211520