I think this has a fiberglass body.  To me, the rim around the edge looks wider than normal.

“Hi I have for sale a 48 willys cj2 has a clean Oregon title a cage complete front clip has original running gear as far as we know but it has a spring over done. It rough but would make a great wheeler project as some one cut the floor to fit a different transmission looking for 600 obo will consider trades for things that go bang when you pull the trigger text me at 503-757-2532 or email thanks Chris”

http://portland.craigslist.org/clc/cto/2486133005.html