Rare French platinum and diamond Art Deco pocket watch, beige and silver guilloche dial, with Arabic numerals and breguet blued steel hands, subsidiary seconds dial, border of case decorated with two rims of black enamel and inset with fine single cut diamonds, lever escapement, unsigned dial or movement, crown inset with cabochon black onyx, working order, minor chips and loses to enamel, slight discolouration to dial (A/F), case 42 mm total weight 50 grams