A Ring 500/1000 platinum set with 4 brilliant cut diamonds with approximate weight of 3.82 ct., J~K colour degrees and VVS clarity, inert to weak fluorescences Portuguese signs of use Lisbon mark (1938-1984), José Francisco Franco maker's mark (reg. 1933) Dimensões (altura x comprimento x largura) - 13 (16,7 mm) cm; Peso - 6,7 g. Notes: Provenance: Jewelry Collection of a Soprano of the São Carlos Nacional Opera House, Lisbon.