Couldn’t properly classify this. During what was then known as the Great War the major powers all put guns on rail cars, often coastal defense guns, in an astounding array of calibers.
The US, upon joining, worked with France’s supply, and cobbled together a few of their own.
Rear Admiral Earle recommended building custom railcars for battleship guns. (The base named for him is down the road from me.) Originally planned for 16" guns, there weren’t enough to spare, so 14"/50 were used.
Five such trains were built - Baldwin built the engines and gun car, Standard Car the others.
Each train was actually even longer; the remainder were more box cars.
To fire the gun cars were parked over a trench dug so the guns could be raised to high angles, resulting in a ranges of 30,000 yards. They were usually fired blind, as having a spotter aircraft over the intended targets was problematic.
The color was either navy grey or olive, I cannot find a colorized image. There is one such battleship railway gun left in the Washington Navy Yard, painted battleship grey, so I went with that.
The model itself is a combination of two different photo-etch trains, the battleship car scratch-built with bogies from those models and a 14" gun leftover from some kit I built years ago.
