With the closeout soon approaching here, I offer this, a Walthers 9101 observation that someone gave me a few years ago.
A fellow O scale modeler, he suffered a stroke and had done some work on the kit earlier.
He wanted it to be a B&O car, but when I looked into the matter of 4 compartment/lounge /observations, I learned that it was a rather small group of 15 or so built in 1925.
All had names of buildings and locations that were along the Boston - DC corridor. Further checking showed most had PRR Tuscan red paint.
A few others were green, with names in the area served by the New Haven.
Some were sold by Pullman in the late 1930's, others taken over by the government in the WW II years. Several were ice air-conditioned in the 1930's, a PRR favorite.
The remaining cars were stored, having limited accommodations at a time of heavy passenger traffic.
After the War, "Federal Hall" and a few sisters resumed service until 1948, when PRR got them from Pullman after its divestiture and converted them into coaches.
Here is "Federal Hall", as it likely appeared between 1946 and 1948. A narrow window to be sure and a last performance for a classic, Pullman design.
This model has interior details, passengers, a porter, a pair of movable markers that can be prototypically hung at either end and LED lighting.