An early 1940's art deco, platinum and diamond rectangular plaque brooch, of openwork angular design, the central round brilliant-cut diamond approximately 0.3cts in rub-over setting within a frame of 'eight-cut diamonds estimated to weigh a total of 2.4cts, 48mm long x 24mm wide, stamped with makers mark 'JH' and 'PT 0950', 12.8gms

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