An Art Deco diamond double-clip brooch

An Art Deco diamond double clip brooch, the brooch consisting of symmetrical geometric design clips set throughout with round brilliant and eight-cut diamonds, estimated to weigh a total of 4.5 carats, set to a platinum mount with clip fittings and a detachable brooch fitting, measuring approximately 50mm x 20mm gross weight 17.6 grams, circa 1920s,