UDSSR-CHAIKA 1603 Brand UDSSR-CHAIKA Caliber 1603 Size Function Version Hands Stem Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.407BClutch wheel983004071603410BWinding pignon983004101603