Cartier, a gilt silver lady's wristwatch

Cartier, a gilt silver lady's wristwatch, 'Must de Cartier Tank', the rectangular cream-coloured dial with Roman numeral indicators and blue steel hands, the winder set with a cabochon synthetic sapphire, the case in gilt silver, to a red leather strap, dial 2.1 x 1.7cm, manual winding movement, dial, strap and case back signed Cartier, case back numbered CC727759, Swiss and European convention marks for silver