Patek Philippe: A platinum waterproof perpetual calendar and chronograph wristwatch with circular case, fluted lugs and concave bezel, the matt silvered dial with raised baton numerals, subsidiary dials for running seconds combined with 24 hour indication, elapsed minutes with leap year indication, sector for the moon with date ring, apertures for day and month, sweep centre seconds operated by two round buttons in the band, with screwed back and makers brown leather strap with platinum buckle, brass bound presentation box with date change tool, red leather wallet with certificate of origin, ref. 3970E, the movement No. 876896, dated 23rd August 1991