The model shown below of road number 44824 is by S-Helper Service, Inc., part number 01839. The detail is excellent and it appears to be an accurate model. The road number is correct (one of a series of numbers between 44001 and 46725, inclusive). The model only has two flaws: the railroad name is missing the first "N" (a problem that affected this run of these PRR cars). The car has the correct Andrews 2D-F3 trucks, which are actually sprung. The doors slide open. The second flaw I've found with this model is that the top bar for the door's support extends further to the left (see the correct implementation of that feature in the model below, PRR #518392). The circle-keystone logo is correct for the era I model. The model is shown with HO-scale Proto Max couplers, and scale wheels installed. I also bought PRR #45319 (S-Helper Service part #01840), which was the other car they released in this run.
The model shown below of road number 518392 is by S-Helper Service, Inc., part number 00067. I got it second-hand. Judging by the part number this must be an older model. Unlike the newer model above, this one appears to have all the lettering. It also appears to be a very accurate model and its road number is also correct (one of a series of numbers between 518217 and 518949, inclusive). It has the "newer" Youngstown-style corrugated doors, rather than the original wooden doors. It is pretty obvious that it is a different color; a very dark red. The other difference is that this model's doors don't open. The model is shown with HO-scale Proto Max couplers, and scale wheels installed.