Ulrich introduced this HO-scale trailer-on-flatcar model in 1956 with four releases. While Ulrich’s offerings prior to this were kits only, buyers could purchase this freight car fully assembled. The ready-to-roll model came equipped with “NMRA couplers” (meaning X2f couplers) and listed for $4.50. The flatcar was offered in kit release for $2.25. The road names in 1956 included Baltimore & Ohio (PF1), Southern Pacific (PF2), Monon (PF3), and Santa Fe (PF4). the road name reference the decoration on the trailer model, which was Ulrich’s 35-foot example.
ABOVE: From a 1956 catalog, here’s the entry showing the then-new trailer-on-flatcar model.
For more on Ulrich, check out HO Collector‘s 4th Quarter 2020 edition and the article, “An Introduction to Ulrich” by Tony Cook. You can purchase individual issues of HO Collector and other White River Productions’ magazines and books by visiting your local hobby dealer or going to the publisher’s website.