I spotted a couple items I wanted in a recent eBay lot and with them got a few items I was not as interested in, including this car with these trucks.
If they are manufactured items I don’t have the slightest idea of the manufacturer [But see UPDATE at end]. What is sort of sad as well is I don’t believe there is anyone reading this article that will have any idea either. Some things we can figure out with some effort and luck but if this is a manufactured item then this for sure is a low production, oddball item by probably a very minor maker and from the detail level pretty early on.
If anyone else even has a pair of these on a car I would be curious to hear from you.
UPDATE: My thinking now is these are Hoffman's trucks, sold with their kits introduced in 1938. More on Hoffman's here. They appear to have produced the first sprung trucks ever marketed in American OO.
UPDATE II: See this article for another Hoffmans truck, one that looks to be complete and original.