Not sure how this will go. I thought it might be interesting to show some examples of later prewar and early postwar kit built O scale cars. Can be two rail, three or outside third rail. I will start with a few Lobaugh refrigerator cars. These are all listed in my 1941 Lobaugh catalog but ther emay be others introduced later int he postwar period.
Lobaugh Crisco reefer car.
This is th underside of the PFE car but most Lobaugh freight cars have a similar built up underframe of brass construction. Very clean and tidey. This car has some brake lines added. It also retains the typcial Lobaugh trucks
I just picked up this NP reefer from a fellow collector and it is a nice one for me.
Here is the long PFE reefer as shown in the 1941 catalog.
Showing what we presume may hvae been the original owner/builder of the car.