The “problem” with these cars is they were not a single design, blt. date or carbuilder. (Someone had plans to produce an HO model. SRHA provided the drawings, then pffft, nada. It makes it difficult for us to do research for mfgr’s. with no track record or folks we do not know.)

Here’s a 1960s freight car diagram book page* for the car in Tim’s photo, 9799. It was built as Southern’s Coster Shop in Knoxville as a “prototype”. Production cars built later by P-S were similar but had several variations. 

*Southern never really built rolling stock. This was one of D.W. Brosnans’ effort to attract new business. I don’t know how often they were seen off the Southern or not in VA and NC (“plate ??”).

To my knowledge, their last use was for carrying auto tires…

Ike

*Would anyone be interested if SRHA published the diagram book? We have sold around 500 copies of the 1970s version in a three Volume set. (They may still be available from SRHA?)