REGO 2300 Brand REGO Caliber 2300 Size Function Version Hands Stem 10017 Stem (subs.) Stem (2 pce) Balance staff 40009 Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery WatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem80210017723Balance staff ST -shock-absorber80240009