Here’s a wonderful picture of the French TEE from the 1970s.
I rode one of these trains between Paris and Toulouse in 1978. Happily, this was also the period of Kraftwerk’s famous TEE LP, and was probably the most stylish iteration of the train. I loved those internal venetian blinds.
I’ve posted before about these trains and about Kraftwerk, and about the history of machine-sounds as music.