This appears to be sitting on some kind of jeep chassis-turned trailer?.
https://boise.craigslist.org/tls/d/emmett-1942-hobart/7399057978.html
“I have a 1942 Hobart welder. On a custom made trailer, a Willie’s motor and it welds great but has a loose wire connection. The trailer is worth 1000 by itself no loballers”