An art deco enamel, emerald and diamond lapel watch by Lacloche Frères, circa 1925. Photo: Bonhams.

The hinged elongated hexagonal watch case, pierced and set with square, brilliant and single-cut diamonds, with three black enamel and fluted emerald terminals, one of which is the winder, the sides of the case with additional cabochon emerald decoration, the whole within a "broche poigneé" frame of similarly cut diamonds, mounted in platinum, diamonds approximately 4.00 carats total, oval dial and brooch signed Lacloche Paris, numbered, partially struck maker's marks, French assay marks, later pin fitting, fitted case by Lacloche Fres, 15 rue de la Paix, Paris, 3 New Bond Street, London, W1. Estimate £4,000 - 6,000 (€4,900 - 7,300)

For similar examples of "broche poigneé", or door-handle brooches, see Gabardi, Melissa, "Art Deco Jewellery 1920 - 1949", The Antique Collectors Club, 1989, page 107, an enamel, emerald and diamond brooch by Mauboussin, and Rudoe, Judy, "Cartier 1900 - 1939", British Museum Press, 1997, page 239, plate 171, an onyx and diamond brooch by Cartier.

Bonhams. FINE JEWELLERY. London, New Bond Street, 30 Apr 2014 - www.bonhams.com