Re: 2 cylinder gas electric welder
I hate to belabor the obvious, but it may be a Star Electric Welder....
If it was made for the military, it should have a metal tag with a contract number, it will also have references to "Refer to TM-#####", or "FM-#####", or both stenciled in red or orange paint.
It IS possible that Star Electric got a sweet deal on surplus paint, and put that to use, after all, that is why the Post Office painted all those lock boxes olive drab green- they got it surplus.
Now, a photo or a link to a photo image would be of some help, but be aware, after WWII, there was a lot of surplus gear, which was still being sold into the 1970's. Depending on how yours was assembled, it may have been almost all surplus gear. If the welding head looks to be the size of a 3/4Hp "C" frame motor, it may actually be an aircraft starter/generator- In which case, look for a flexible type coupling at the front of it. And many companies did this, as I happen to have that was made in Minneapolis in this manner.
If Star wound the welder head, and wound it on a different frame style, it should still be a NEMA designated frame style, and there would be obvious indications it was made a certain way, rather than assembled from parts from various manufacturers. Nothing wrong with either type, just makes it easier, or more difficult to locate parts.
The real question might be who made the engine? Any ID plates? any distinguishing characteristics, or "manufacturer numbers" on the magneto to narrow down an application?
F.M. made many magnetos for many companies, including their own.