Cal. 79091 automatic nickel lever movement 68 jewels minute repeating on coiled gongs • white dial applied yellow gold baton indexes aperture for year four subsidiary dials for day combined with constant seconds moon phase combined with 30-minute register month combined with 12-hour register and date calendar in Italian • large platinum case with stepped bezel repeating slide on the band screw-down crown flanked by two rectangular chronograph buttons case back secured by six screws • case dial and movement signed • with a platinum IWC buckle