A Necklace 800/1000 bicolour gold Portuguese signs of use Oporto mark (post 1985), António Francisco de Carvalho maker's mark (reg. 1931) Dimensões (altura x comprimento x largura) - 110 cm; Peso - 194,2 g. Notes: Provenance: Jewelry collection of a soprano opera singer of the São Carlos National Opera House, Lisbon.