Nice example of a trestle bridge, and a great idea to get a piece of track to fit. This style of wooden bridge comes in a variety of lengths and with “additions” like a shack on top, signal lights, brass name tags and telegraph pole tops. Some of them were marketed as fitting both Narrow and Wide Gauge trains. I don’t have a good resource for identifying them. The Schuweiler book isn’t very helpful, but I am sure there must be a resource for them out there somewhere.
Combing the catalogs would help, but I understand that they can be incomplete. Dealing price lists supposedly add more info, but I have none of the above to investigate.
Here are some additional photos of the Champion Line passenger cars. I matched them up with appropriate Flyer sized engines. There is one set that has them headed up by a sheet metal Hiawatha with the mechanical whistle.
The Flyer catalogs carry bridges throughout the 1930s without giving much detail. Is your bridge 42" long or is that the length of the track you had made?
Here is the illustration from the 1931 catalog. My best guess is that it is the #211 Universal Bridge, but I may be wrong.
I can’t quite make out the figures in the description on the catalog page; my bridge is between 28 and 29 inches long. It sure looks like the illustration, but, since it is a drawing, I don’t know how much we can draw from that; in fact, dimensions tend to be a little fuzzy, too
palallin first I found this on the Salt Lake Bridge is 28 in. long 16.5 in. high and 6.5 in. wide second that circuit breaker is great I have never seen one let a lone in the box.
It measures approximately 42" and has a brass plate identifying it as a Trestle Bridge and giving the mileage to San Francisco and Denver. It has a fixture from a crossing signal mounted at each end.