Art Deco ring in platinum, diamonds and sapphire

Important Art Deco ring in platinum with stepped geometric decoration entirely paved with old-cut diamonds, adorned with an old-cut diamond of approximately 1.80 carat and a cushion-cut sapphire of approximately 1.50 carat. French work, circa 1930. The ring is accompanied by an HRD certificate n°J190000088124 dated January 14, 2020. Information regarding the stones: Diamonds : Total weight = 27 diamonds for approximately 3.40 carats. Estimated color: F/G - Estimated purity: VS2/P. Sapphire : Weight: approximately 1.50 carats. Dimensions: approximately 7 x 6 x 4 mm Color: midnight blue, no thermal modification observed. Slight surface scratches, good general condition. Dimensions: Ring width: 2.2 cm. Finger size: 47 (sizing possible on request) Gross weight: 14.14 gr.