A Ring, gold and Platinum, set with 18 brilliant ancient cut diamonds with the approximate weight of 1 ct. and the central one with the approximate weight of 1 ct., Portuguese, 19th/20th C. , Eugénio Marques de Almeida maker’s mark from Lisbon (1932-1974), marked Contrastaria de Lisboa IN-CM Contrastaria de Lisboa IN-CM assay mark Dimensões (altura x comprimento x largura) - 12 (16,5 mm) cm; Peso - 8,6 g.