Diamond ring

geometric composition set with 2 pieces of old European cut diamonds weighing a total of about 0.50 ct (Si-Si2/F-H) and 12 pieces of old European cut diamonds weighing a total of about 0.40 ct (Si-Si1/G-I),
gold pr.0.585, total weight 4.340 g., ring size 17
The product was made in the interwar period of the 20th century.