Advertisement of the Companhia Real dos Caminhos de Ferro Portugueses (Royal Company of the Portuguese Railways), showing the special tariff n.º 3, for tickets at reduced prices between the railway stations of Porto - Campanhã and Aveiro. This image was published on the Gazeta dos Caminhos de Ferro magazine no. 357, of the 1st November 1902, and scanned by the Hemeroteca Municipal de Lisboa.