CJ-3B? Cab Enclosure Hardtop

It looks like this might fit a CJ-3B.

https://missoula.craigslist.org/bar/d/missoula-1940s-willys-jeep-topper/6888946130.html

"This topper came off a 1940's or 1950's Willys Jeep. We don't have the windshield glass. We are asking $500 or trade."