Here is a picture of the restaurant car of theFrench railway SNCF flagship service between Paris and Nice, called Le Mistral. This is from the period of modernisation at the end of the 1960s.
The evident formality of the whole is practically 19C…that’s pretty French.
I love the internal venetian blinds on the windows. I remember these, from the 1970s, as a powerful indicator of modern sophistication. In contrast to the lace-type half-curtains of the previous era.