ETA B99.501BrandETACaliberB99.501Size16 1/2FunctionSS (6) ( 21.000)Version21.600Hands1.15x2.00x0.27Stem9026Stem (subs.)Stem (2 pce)Balance staff35706 INCABalance staff (subs.)Mainspring (subs.)1,50x14,5x0,17Mainspring (subs.)04307BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.043076498Zugfeder770