January 22 1984 was the first day of the new TGV service between Paris and Lausanne, with connecting train in Frasne for Neuchâtel and Bern (whereas before that day, direct classic trains were split in two sections in Frasne). The picture shows the Swiss fast and comfortable EMU, formerly a Trans-Europ-Express train, one of the five quad-voltage "RAe TEE II" sets numbered 1051 to 1055. From Jan 1984 on, they provided the Frasne-Bern services in connection with the Paris-Lausanne TGVs. The unit on the picture had reached Frasne earlier, had given connection to a new TGV going to Paris, and was ready to go to a side track, to wait for the afternoon return train.
The crack passenger trains in Europe before the high speed era (1956-1080's). They were day 1st class only trains, and seat reservation was compulsory, quite a distinctive feature at a time when one could board most trains without a reserved seat or bed.