diamond cocktail ring

A delicate 14 carat gold cocktail ring with set in platinum navette and brilliant cut diamonds with a brilliant cut center stone (circa 1.1 carat, VS2, H-I, in total circa 3 carat), signed: Schlumberger for Jean Schlumberger and Tiffany for Tiffany & Co., U.S.A., circa 1950.

ring size: 15.75 mm. 5 US.
weight: 9.4 gram