Vintage 18ct & Platinum Sapphire & Diamond Art Deco Ring

A lovely 18ct & Platinum Art Deco ring comprising of a beautiful mid blue Mille grain set, Square Cut Sapphire weighing approx .06ct. Surrounded by four Old cut diamonds all set in a square Platinum open back pireced gallery. A further Old Cut diamond in each shoulder leading to an 18ct yellow gold shank. Ring size= O (18mm). Stamped '18ct PLAT' on the shank. Circa 1920.