A WW2 jeep on the run near Fort Riley, Kansas. The photo is dated April 1942. The troops still have their pre-WW2 Helmets. There are dozens of jeep and WW2 photos on line at the Library of Congress.
You might be interested in BANTAM, FORD AND WILLYS-1/4-TON RECONNAISSANCE CARS, This is a book filled with photo’s of the early vehicles that would soon become known world wide as the “jeep”. There are a ton of close up photos so it may be of interest to modelers as well as to those restoring the old pre-standardized jeeps.