An early 20th century diamond cocktail watch, the oval dial with black Arabic numerals and blued steel hands, within a diamond set bezel of brilliant-cut and single-cut diamonds, millegrain edged throughout, between hinged diamond shoulders, delineated by a row of scissor-cut sapphires to each shoulder, (sapphires untested for natural versus synthetic origin), with cabochon set winder, white precious metal unmarked, on later elastic strap, with diamond slider, length of diamond bezel and shoulders 5.5cm. £1,200-£1,500