Art Deco ring with diamond

An 18-carat white gold and platinum Art Deco ring set with a row of 3 transitional-cut diamonds (app. 1.5 carats, G-H, Vs). Surrounding this row is a large curl set with diamonds (app. 1.65 carats, G-H, Vs-Si) culminating in a row of carré-cut diamonds (ap. 0.3 carat, G-H, Vs-Si; in total app. 3.45 carats). France, circa 1920.
weight: 14.35 grams
ring size: 17.75 mm / 7 US