A lady's Art Deco diamond cocktail watch

A lady's Art Deco diamond cocktail watch, 1920s, the silvered rectangular face with black enamel numeral indicators and blued steel hands, to a bezel and integrated bracelet of geometric design set with single-cut diamonds, the back links plain, dial 1.2 x 0.6cm, bracelet length 16cm, watch case interior stamped All Plat, plain bracelet section stamped 18ct