UDSSR-CHAIKA 1600 Brand UDSSR-CHAIKA Caliber 1600 Size 7 Function Version Hands 0,45x1,00 Stem 6526 Stem (subs.) Stem (2 pce) Balance staff 28323 Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8026526723Balance staff ST -shock-absorber80228323