An Art Deco sapphire and diamond cocktail watch head, the silvered tonneau-shaped dial with black Arabic numerals, unsigned jewelled movement, the bezel and small flared panel shoulders set with single-cut diamonds and scissor-cut sapphires, the case stamped to the inside ‘B&M’ and numbered ‘71203’, the reverse of the case similarly numbered and signed ‘Baume & Mercier - Geneve’ and ‘Platine’, with cabochon sapphire winder, watch head length, including shoulders 34mm. £600-800