Platinum Chronometer no. -

Case: Platinum and sapphire openface watch Dial: Siverdr matte dial, marquise-cut sapphire numerals and one marquise-cut diamond numeral, sapphire-set hands, with platinum folding fob edged in onyx. Diameter 43 mm. Movement: unknown, but in all probability caliber 17 ligne, 18 jewels, all adjustments and Poincon de Geneve quality seal. Provenance: 1928 - Niton, Geneve 1928 - C.F. Bucherer, Lucerne 1982 - Sotheby's Sotheby's, Watches, Scientific Instruments, Objects of Vertu, and Continental and English Silver, York Avenue Galleries June 14,15, & 16,1982 Lot 151, PLATINUM AND SAPPHIRE OPENFACE WATCH, Niton Watch Co., Geneve, circa 1930, retailed by Bucherer, Lucerne, silver matte dial, marquise-cut sapphire numerals and one marquise-cut diamond numeral, sapphire-set hands, with platinum folding fob edged in onyx. Diameter 43 mm.