pv83:
Welti-Furrer from Switserland (nmp), can anyone identify the tractor unit? Can’t imagine they actually used that to pull the trailer.
Saurer 4cm
google.com/search?q=saurer+ … GB817GB817
…or FBW AX35:
militaerfahrzeuge.ch/unterkateg … 1_158.html
They look like they were both built to the same specification. It is a 4x4, but I guess they just used it for yard shunting. You would want a bit of ballast, to drag that trailer up a Swiss Alp.