Tank ring in pink gold, rubies and diamonds

18k rose and white gold ring (750/1000) set with rubies and diamonds. One old-cut diamond, weighing approximately 0.37 ct, surrounded by rose-cut diamonds, weighing approximately 0.05 ct, surrounded by 15 square-cut rubies, weighing approximately 0.20 ct. Total diamond weight approximately 0.42 ct. Width at the top: 1.31 cm. Ring size: 53. Total weight: 12.86 g. Owl hallmark. Excellent condition.