This is likely a ’47 chassis with an M-38 body on it.

https://seattle.craigslist.org/oly/pts/d/olympia-willys-jeep/7411741083.html

“This is a titled 1947 Jeep. It has a M38 body and engine. This Jeep runs but currently has the fuel tank out since the tank it came with when I got it was for a CJ2A. I have a brand new M38 tank to install. I have also replaced three of the four brakes (cylinders and pads) and have the forth one plus master cylinder on hand. I just haven’t had time to install it. This sale will include both fuel tanks and the remaining brake parts and every thing you see in the photos and the spare M38 engine. This is a project jeep with straight body with no rust”