Boucheron, a gem-set brooch

Boucheron, a gold, sapphire and diamond brooch, 1950s, naturalistically modelled as a feather constructed from gold wire, set with circular-cut sapphires and brilliant-cut diamonds, length 8.1cm, signed Boucheron Paris, numbered 13503, French assay mark and partial British hallmark for 18ct gold, French maker's mark HD with Maltese cross