AS 1789BrandASCaliber1789SizeFunctionVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.205= 1580Center wheel drilled + cannon920002051580227= 1538Sweep second pinion920002271538