Thanks for answering, The only other information I have is the box they came in. It's a Williams deluxe 5 car madison set. On the end panel is hand written "Strasburg railroad 4-car passenger set  A Strasburg train shop exclusive"  The cars are 14" long,  have triple axles and are modeled after the old passenger cars that the railroad uses.
I hope this helps.

I bought a 4 car set of Strausburg RR 0 gauge passenger cars in the late 1980s. I can't find any information on them, even at the Cho Cho barn in Strausburg PA where they were purchased. I think they were $75 each at that time.  Does anyone else have this set or have any info on them.
Thanks