gold ring with diamonds

An 18 carat gold ring set with zeven round, brilliant cut diamonds. The shank is ribbed and the diamonds are set in a circle with one stone in the middle and the others in a circle around it. (app. 0.20 carats in total), signed and numbered: VCA @ 77 FRANCE 18KT. 5K822. France, circa 1970.

ring size: 16.5 mm / 5 ¼ US
weight: 7.65 grams
width: 3.5 tot 11.5 mm