Bidspirit auction | Portugal * 1961 – Letter-cards

Portugal * 1961 – Letter-cards exempt from postage * Airmail (Aerograms). Set of six aerograms with advertising inscriptions from Banco de Angola (OM7d), Banco Comercial de Angola (OM7f), CIDLA (OM7j), Comida deliciosa com oliva CUF (OM7l), Companhia Nacional de Navegação (OM7p) and Estaleiros Navais de Viana do Castelo (OM7t). Mint aerograms, very well preserved.