A FINE DIAMOND RING, BY BOUCHERON, CIRCA 1970 The navette-shaped plaque of bombé form, set with brilliant-cut diamonds, between gold borders of openwork wavy design, mounted in 18K gold and platinum, diamonds approximately 3.00cts total, signed Boucheron Paris, numbered, with partial maker's mark for 'Atelier de Joaillerie Vendôme', French assay marks, ring size K Workshop mark 'Atelier de Joaillerie Vendôme' registered in 1967, located 26 place Vendome in the 1st district of Paris, working for Boucheron, also located at this address.