Platinum, sapphire and diamond garter ring

Art Deco ring in 950 platinum, set with a sapphire and diamonds. The rectangular-cut sapphire weighs approximately 1.10 carats and is surrounded by ten old-cut diamonds, each weighing approximately 0.40 carats (approximately 0.04 carats each). Width at the top: 0.86 cm. Ring size: 54. Total weight: 4.02 g. Hallmarked with a dog's head. Excellent condition.