IWC 916BrandIWCCaliber916Size13 1/2FunctionSC-CLD-AUT-ALARMVersionHandsStemStem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)eigenMainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.771BMainspring AUT sliding attachemnet94200771916