λ Boucheron, a tortoiseshell and gold 'Caraibe' demi-parure

λ Boucheron, a tortoiseshell and gold 'Caraibe' demi-parure, 1970s, comprising: a bracelet, composed of rectangular links of polished tortoiseshell, mounted in 18ct gold, length 16.7cm, signed Boucheron, French export assay mark for 18ct gold, French maker's mark for Mathon, British import hallmark for 1973, fitted case stamped Boucheron; and a pair of earrings of matching design, length 1.8cm, clip and post fittings, similarly marked