761 - A pearl and diamond "Flower" brooch

A pearl and diamond "Flower" brooch Bicolour gold, fineness .800, and silver, fineness .833 Set with a cultured pearl (3.6 mm) and rose-cut diamonds Porto hallmark (1938-1984), goldsmith's mark of Manuel António de Oliveira (1941-1973) H.: 7 cm 11.5 g VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de - "Marcas de Contrastes e Ourives Portugueses (1887 a 1993)", vol. II. Lisbon: IN-CM, nos. 98 and 2845