A ring gold set with an old brilliant cut diamond weighing approximately 3.20 ct., colour grade K~L and purity SI 20th C. (mid) signs of use without marks, pursuant to Decreto-Lei nº 120/2017, of September 15th - art. 2nd, no. 2, paragraph c), only with Fernando da Silva maker's mark (reg. 1968) Dimensões (altura x comprimento x largura) - 17 (18 mm) cm; Peso - 4,6 g. Notes: vd. VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de - "Marcas de Contrastes e Ourives Portugueses (1887 a 1993)", vol. II. Lisbon: IN-CM, nºs 4213.