I have tried carefully to get the cars and trucks for the era 1955 to 1961.There are plenty of 4 mm models around but not many for 3.5 mm. So over a period I was able to get a few which I thought would suit.
First a 1948 Holden sedan and a 1954 FJ Holden panel van both from Road Ragers, a 1936 Ford sedan and 1946 Chevrolet pick up both made by Mini Metals. There is one more which is an International R-190 truck also by Mini Metals which is being kit bashed into a grain truck for the silo area. They have been weathered up a bit in the usual way of pastel chalks and then sprayed with Testors dullcote because as new they look very much out of place.