So they are narrower then the Aristo car, but about as high?
From the measurements listed, and all the other information gleaned, they really appear to be 1:32 but as is typical, sat way too high stock.
4.5" wide gives 12’ wide, a little wide for 1:32, closer to 1:29, but I think the length being spot on is a dead giveaway.
Also in the picture, it looks smaller than the dome car, which is either an Aristo (which makes sense) or sometime modified with a USAT dome…
Greg