These are colour lithographs published by the Swiss National Tourist Office during the 1940s. They were printed by Wolfsberg, in Zurich.
The artist is Alois Carigiet, and the prints are from a series called, Beautiful Switzerland…
It turns out that Carigiet is famous as an artist, children’s book writer and illustrator, and as a poster artist.
I love the idea of the Alpine sublime in these pictures, and of the slight delirium of space, light and altitude, rendered by the optical disturbance of sharp light, and with harsh contrasts of light and shade…
I like that, in a couple of the prints, there are trains and railways, and paddle-steamers.
Lovely.
I already posted about the history of the Alpine sublime, here
http://paulrennie.rennart.co.uk/post/136819974040/speed-ski-style-and-sophistication-the-alpine