Tucked in behind the engines and ahead of the baggage car was this lovely vehicle that looked like (but is not) a private railroad car. Besides the fact that private cars run at the rear of the train, not in front, you can see that this is actually a Federal Railroad Administration car, DOTX (Department of Transportation) 221. Despite the Pennsylvania Railroad-inspired paint scheme, a bit of searching online turns up "the car was built by Pullman Standard in 1954 as CNR 1083 "CAPE BRULE", a 2 double bedroom 2 compartment buffet lounge." That's Canadian National.
More searching suggests that the faux-Pennsy car is an experimental track-monitoring-and-measurement car.