Here is a picture with some odd cars coming out of the curve and over the bridge. Its 1942, Peru, IN, C&O railroad. Name those cars! :tb-biggrin:
I think they're Matheson Dry Ice Reefer cars used to carry dry Ice across the country in bulk. I believe AMBRIOD made these cars in HO half a century ago.
Here is a web page with picture of the car, it looks to be the same car in the pic http://www.rr-fallenflags.org/acfx/shpx1505asw.jpg