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A diamond ring Gold, fineness .800 Set with 3 brilliant-cut diamonds weighing approximately 1.10 ct. Lisbon hallmark (1938-1984) and goldsmith's mark of Manuel Dias Maia (reg. 1954) Size: 24 (EU) 11.3 g VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de - "Marcas de Contrastes e Ourives Portugueses (século XV a 1887)". Lisbon: IN-CM, 1996, nos. 25 and 3263