Bidspirit auction | ‘Bow’ brooch in Portuguese gold

‘Bow’ brooch in Portuguese gold and silver set with an emerald and diamonds - 1 cabochon-cut emerald; approx. 140 diamonds in ‘rose cut’ and ‘old European cut’. 800‰ gold hallmark used at the Porto Assay Office from 1938 to 1984. Unidentified goldsmith’s mark. Notes: see VIDAL, Manuel Gonçalves; ALMEIDA, Fernando Moitinho de – “Portuguese Hallmarks and Goldsmith’s Marks (1887 to 1993)”, vol. II. Lisbon: IN-CM, 1997.