An 18ct White Gold Calendar Chronograph Wristwatch, signed Cartier, model: Tank Americaine, ref: 2312, circa 2005, quartz movement, silvered dial with Roman numerals, Cartier secret signature at 10, three subsidiary dials for date, 30-minute and 12-hour registers, inner fifths of seconds track, curved rectangular case with buttons in the band to operate the chronograph, sapphire set crown, case back secured by eight screws, back cover numbered 00215247 2312 and a convention mark 750 for 18ct gold, Cartier strap and a Cartier 18ct white gold buckle, 26mm by 45mm see illustration