Art Deco Sapphire and Diamond Cluster ring set in 9ct gold

Art Deco 9ct Gold Ring with a central large Sapphire surrounded by diamonds All stones are finely facetted and quality stones, set strongly, the claws are all in white gold to enhance the diamonds the Sapphire  having 16 individual claws, and each lower Diamond, with 2 claws to outer edge and the larger, Sapphire claw to the inner edge. Extremely well designed. Gold band Hallmarked  with “375” confirming the 9ct Quality, plus multiple others, not clear, but one being “D ?? Co.”, Jeweller’s Mark.  Dimensions approx.: Ring “N ½” or “7”, “Crown” of gems 8mm x 9mm x 5mm high overall; Band 2mm wide at rear to 1mm wide at shoulders; band thickness 1mm at rear to 2mm at shoulders. English.