Great find!
I've been wondering about the suitability of mixing WWI era vehicles, you know; the ones with the hard rubber tires, in 30's era scenarios.
That picture on about page 6 of the trucks at the freight station shows trucks with those early wheels. Also of interest is the truck on the right has a mix of tires; Inflated on the front and hard rubber on the back.
Those rubber tires would be hard on your back. You'd feel every bump in the road! Say, that gives me an idea... a new disadvantage in character generation- 'Bad Back' for reduced mobility or a negative die roll modifier when making an athletic challenge like crossing a rope bridge or swinging across a chasm on a rope.
This calls for some kit bashing!