Cal. RD56 nickel-finished lever movement stamped twice with the Geneva seal 21 jewels the silvered sector dial with blue baton and applied Arabic numerals outer blue Arabic five minute divisions and pulsometer scale two engine-turned subsidiary dials indicating constant seconds and 30 minutes register in circular water-resistant-type case with glazed screw back downturned lugs two round chronograph buttons in the band 18K white gold Roger Dubuis buckle case dial and movement signed