Jewellery, Watches and Objects of Vertu to include the personal archive of Louis Osman, goldsmith and architect

A pair of ruby and diamond earclips, by Van Cleef and Arpels, the earclips of tapering half hoop form, set with lines of graduated brilliant-cut diamonds, each supporting a central quatrefoil of round mixed-cut rubies, mounted in yellow gold, bearing French eagle’s head assay marks, stamped ‘750’, signed ‘VC&A’ and numbered ‘123433 SA’, earclip length 20mm. £2500-3000