ROLEX 1601BrandROLEXCaliber1601Size9 1/4FunctionVersionHandsStem4507Stem (subs.)Stem (2 pce)Balance staffBalance staff (subs.)Mainspring (subs.)0.80x 8.0x 0.10Mainspring (subs.)2184BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.401= 1600Winding stem (Generic)8024507