White gold solitaire-style ring with a brilliant-cut diamond (0.40 ct)

18 K white gold solitaire-style ring with a round brilliant-cut diamond in the eight-prong chaton setting (approx. 0.40 ct, M1, TCr, VVs). Gross weight: 3.24 grams. Ring size: 53. Marked: French eagle head hallmar used between 1847-1919 and a posterior domestic gold hallmark of 750 fineness used since 2016.