A ring 500/1000 platinum set with a South Sea pearl (11 mm) (untested), 10 baguette cut diamonds weighing approximately 1.30 ct., 13 navette cut diamonds weighing approximately 0.78 ct., and 10 brilliant cut diamonds weighing approximately 0.90 ct Portuguese Lisbon hallmark (1938-1984), Carvalho e Castro Ldª maker's mark (reg. 1951) Dimensões (altura x comprimento x largura) - 16 (17,5 mm) cm; Peso - 13,8 g. Notes: vd. VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de - "Marcas de Contrastes e Ourives Portugueses (século XV a 1887)", IN-CM, nº 94 e 3196