Fiberglass, but not all-molded. Seemed interesting for someone looking for a small, lightweight fifth wheel. Appears to be an original and unmolested vintage unit. Located in Apache Junction, near Phoenix, AZ.
https://phoenix.craigslist.org/evl/r...791067978.html
This is a referral. I have no affiliation with the seller nor personal knowledge of the trailer. Any inquiries should be directed to the seller via the Craigslist link.