ZENITH 1740BrandZENITHCaliber1740Size7 3/4FunctionVersionHandsStem5924Stem (subs.)Stem (2 pce)Balance staff22703Balance staff (subs.)Mainspring (subs.)1,10x6,50x0,085Mainspring (subs.)BatteryWatchpartsPart NocaliberdescriptionoriginalArtno.180=1730Barrel with drum + cover995001801730200=1730Center wheel + cannon pinion995002001730210=1730Third wheel995002101730260=1730Minute wheel995002601730401=1730Winding stem8025924407=1730Clutch wheel995004071730410=1730Winding pignon995004101730415=1730Ratchet wheel995004151730420=1730Crown wheel995004201730434=1730Clicking spring995004341730440= 1730Yoke spring995004401730443= 1730Setting lever995004431730710= 1730Pallet fork -pinion 1 lower end-piec.995007101730721BBalance cplt. -regulated995007211740723Balance staff ST -shock-absorber80222703770=1730Mainspring995007701730