UNIVERSAL 501 Brand UNIVERSAL Caliber 501 Size 5 Function Version Hands 0,50x1,00 Stem 4810 Stem (subs.) Stem (2 pce) Balance staff 27508 INCA Balance staff (subs.) Mainspring (subs.) 1,15x6,5x0,07 Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.210= 500Third wheel and pinion99100210500401Winding stem8024810705Escape wheel -pinion straigt piv.99100705500723Balance staff ST -shock-absorber80227508