Yellow gold and diamond ring

1940s ring in 750/1000e (18k) yellow gold set in its center with an old-cut diamond of approximately 3mm in diameter (0.07 ct), openwork and stylized setting. Condition: very good general condition Dimensions: 18 mm / 15 mm Hallmarks: eagle's head and French goldsmith's hallmark Finger size: 52 Gross weight: 1.74 grref. 495.2