A Prince of Wales diamond-set brooch

A Prince of Wales diamond-set brooch, the brooch designed as a plume of three old brilliant-cut diamond-set feathers, signifying the Prince of Wales, gathered by a semi-circular yellow gold crown, all diamonds weighing approximately a total of 1.25 carats, all mounted in white gold,later hallmarked London, 9ct gold, gross weight 9.3 grams, circa 1925s,

No. 30231M