LONGINES 503 Brand LONGINES Caliber 503 Size 11 1/2 Function Version Hands Stem 7559 Stem (subs.) Stem (2 pce) Balance staff 27519 Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.227Sweep second wheel245Cannon pignon sweep sec. H = 270401Winding stem8027559443BSetting lever95400443503445= 501Setting lever jumper combinded95400445501723Balance staff ST -shock-absorber80227519771Mainspring AUT sliding attachemnet954007715012558BDoubel-toothed hour wheel95402558503