Advertisement for the vote on the metro tunnel Tierspital-Saatlen (today used by tram lines 7 and 9). This was an advance for the construction of the Zurich underground railway, which was not approved in a vote 50 years ago.

ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Schollenberger, Kurt / Com_L20-0108-0001-0004 / CC BY-SA 4.0

http://doi.org/10.3932/ethz-a-000987633