Advertsement of the Emprêsa Carbonífera do Douro (Douro Coal Company), that owned the Pejão coal mines and a railway from the mines to the docks on the Douro River, in the Castelo de Paiva municipality, in Portugal. This image was published on the Gazeta dos Caminhos de Ferro magazine No. 1304, of the 16th April 1942, and scanned by the Hemeroteca Municipal de Lisboa.