There are several generations of the 45 tonner. Bachmann’s model is of the last one, with the high hoods, square cornered cab, “Knuckle Buster” doorlatches, and sealed beam headlights. The one most often seen is the 1940’s version with the low hoods, and the rounded corners. There’s an older cab style on all of their centercabs from the 30’s that your photo most closely replicates. 45 Ton diesels have siderods as they have only two traction motors, one powered by each generator. 44 tonners and other larger centercabs have four motors, one per axle, and don’t need the rods. There’s a version of the 45 that has a chain drive similar to the 25 Tonner, and there are some with draft trucks as well. There were also several built with unusual outlines or specialized structures for specific purposes. Most of the types I’m talking about can be seen here: http://www.northeast.railfan.net/diesel132.html for comparison.
Matthew (OV)