A Rare and Limited Edition Gold Curved Rectangular Dual Time Zone Wristwatch, Cartier, Paris, 'Tank Cintree', Circa 1990

18k, two identical circular nickel lever movements, each with 17 jewels and glucydur balance, silvered matte dial, two individual dials displaying two different time zones, upper dial with Roman numerals and inner minute track, lower dial with  Roman and baton numerals, blued steel hands, curved rectangular case with enlarged sides and ends, two cabochon sapphire-set crowns, curved case back secured by four screws in the band, case, dial and movements signed, with a gilt Cartier buckle.

For a similar example of this model, see Cologni, Cartier - The Tank Watch, p.248.