There’s one of those close to me that I may go take a look at. Although I’m getting busy with my D6b. From what I read the ustrac co was around for a couple years after ww2 they made the 10a from surplus parts and a few of their own touches from tractors that were dropped from gliders and planes. Weighs around 3500 lbs. has a 4cyl gas motor and makes around 32 hp iirc.