International Watch Co., Schaffhausen: A gilt/steel calendar chronograph wristwatch, model Porsche design, in circular case with gilt bezel, the grey dial with outer seconds ring, sweep centre seconds operated by two round buttons in the band, subsidiary dials for running seconds, elapsed hours and minutes, aperture for the date, the case with screw-down winder and screwed back with makers mark, numbered 2450765, with black rubber strap and makers deployant clasp, presentation box, outer packaging, guarantee and instructions