Cocktail ring in yellow gold, platinum and diamond

Retro ring set with diamonds. In 18k yellow gold (750/1000) and platinum. One old-cut diamond, approximately 0.28 ct, surrounded by six brilliant-cut diamonds, approximately 0.05 ct each. Total diamond weight: 0.58 ct. Width at the top: 1.85 cm. Ring size: 54. Total weight: 8.25 g. Eagle's head and dog's head hallmarks. Excellent condition.