CERTINA 20-19BrandCERTINACaliber20-19Size9FunctionVersionHands0,50x1,00Stem4817Stem (subs.)Stem (2 pce)Balance staff14901Balance staff (subs.)14401Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401Winding stem8024817723Balance staff, pivoted80214401723Balance staff ST -shock-absorber80214901