GG1 4877,
The 1107/1108 cars with roadnames are some of my favorites.
There are the 1914-1915 series cars with wood litho patterns, with these being a couple of examples
Missing from the above are a UP baggage and a Penn Line in blue.
In 1917, Flyer again started making road name cars, first with the 1107 passenger cars and then later with the 1108 baggage cars. Here are some of the baggage car examples. I believe the Santa Fe car is the most difficult baggage to find.
Penn RR in brown
Penn RR in maroon
And of course the Northwestern Line, which you already posted a photo of
NWL
