OMEGA 2520 Exploded diagram Brand OMEGA Caliber 2520 Size 8 3/4 Function SC-D(3)-AUT Version Hands 0.70x1.20x0.20 Stem = 2000-1 ETA Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) No. 2539X Mainspring (subs.) Battery MovementsArtno.brandcaliberSizehandsfunctionspecial154000ETA2000-18 3/40.70x1.20x0.20SC-D(3)-AUT Watchparts Part NocaliberdescriptionoriginalArtno.2272000-1Sweep second wheelH1= 4239200022720004012000-1Winding stem9200040120007712000-1Mainspring AUT sliding attachemnet820253901481BReduction wheel AUT= 7259650725148114882000-1Pawel winding wheel9200148820002576= 2000-1Date jumper920025762000