Rolex, a lady's diamond and synthetic sapphire Art Deco wristwatch

Rolex, a lady's diamond and synthetic sapphire Art Deco wristwatch, 1920s, the tonneau-shaped silvered dial with black enamel indicators and blued steel hands, to a tonneau-shaped case of geometric design set with single-cut diamonds and calibré-cut synthetic sapphires, to a white gold mesh strap, dial measuring 1.4 x 1.2cm, manual winding movement and interior of case signed Rolex, British import hallmark for 18ct white gold, Glasgow, numbered 112 8399, later adjustable strap stamped 18CT white gold