An Aviaco ticket issued in 1953. The airline had started in 1948 and was still in its early years. It was still a trully independent airline and it competed with Iberia on some routes, such as Madrid - Santiago.
Otro billete de Iberia de 1973, con la imagen corporativa de la época de las bandas coloreadas (que se ha ido modificando ligeramente y es similar a la que se usa hoy en día en los aeropuertos)
An Iberia ticket from 1973, with the coloured stripes which were used as part of their corporate identity at the time. In fact, the coloured stripes theme has been continously used over the years, only slightly updated every now and then. As for now, airport counters are still using it.
(Gracias a Fran Camino por las imágenes de este post)