Barcelona-Zaragoza line at Km. 416.

Detail of the overhead network in Calle de Zorrilla.

Pre-paid station installed in "Viena Park" (Retiro), which, being in the open air, is enclosed in a glass case.

Telephone van.

Aspect of the hall where the inaugural ceremony of the telephone service between Spain and the United States was held. In the background, the podium with the King, the authorities and senior officials of the Company.

Telephone service advertising poster.

Diagram of buildings constructed or under construction by the Company on 1 January 1928.

Junction at the border of the Madrid-Lisbon line.

Last Spanish post on the Portuguese border.

The last Spanish and the first Portuguese post.

Canalisation in Puente de Vallecas.

TRAFFIC : TRAFFIC ROOM OF THE BARCELONA HEADQUARTERS

León-Santiago line, leaving León via the San Marcos bridge.

Poster announcing the masked ball on 20 February 1928.

Detail of the aerial network near the Church of San Nicolás.

Old posts at the level crossing of the M.Z.A. trains.

Malaga. Façade of the power station.

Intercity box.

Façade of the Cartagena Interurban Power Station.

La Unión. Exterior view of the power station.