International Watch Co.: An 18ct. gold perpetual calendar and chronograph wristwatch, model Da Vinci No.734, in circular case with stepped bezel and hinged hooded lugs, the white dial with raised gilt baton numerals, subsidiary dials for running seconds combined with days of the week, date, month combined with elapsed hour indication, aperture at VIII for the year, sweep centre seconds operated by two round buttons in the band, the snap-on back with makers mark numbered 2382856 3750, the signed automatic movement with 36 jewels adjusted to 5 positions, with makers brown leather strap and gold buckle, presentation box, century slide in glass tube and book of instructions 37mm.diam.