MThB Ec 3/5 2 passing the Bussnang viaduct.
Comet Photo AG (Zürich)
CC BY-SA 4.0
ETH-Bibliothek Zürich, Bildarchiv / Fotograf: Comet Photo AG (Zürich) / Com_F64-02511 / CC BY-SA 4.0 / <a rel="nofollow" class="external free" href="https://doi.org/10.3932/ethz-a-000025206">http://doi.org/10.3932/ethz-a-000025206</a>