A lady's Art Deco diamond cocktail watch, 1920s, the rectangular silvered dial with Arabic numeral

A lady's Art Deco diamond cocktail watch, 1920s, the rectangular silvered dial with Arabic numeral indicators and blued steel hands, to a platinum case of geometric design set with single-cut diamonds, on a black cord strap, case width 1cm excluding winder, manual winding movement, case interior stamped PLATINUM, case back numbered 3352, cord broken, case stamped Cartier