31-jewel Cal.410 nickel-finished lever movement, the white dial with applied baton numerals, outer tachymetre scale, three subsidiary dials indicating constant seconds, 30 minutes and 12 hours registers, window for date, in large circular case with down turned lugs, the snap on back engraved with the map of Switzerland and inscription Swiss Made 18K 700 ans Confédération Helvétique, two rectangular chronograph buttons in the band, together with fitted box and outer card, case, dial and movement signed 40mm.