Aha, thanks for clearing that up. So they only think it is Fiberglas, huh? I still like it better than a soft-sided tent trailer; wonder what it weighs.
The model is a 1978 Apache Mesa which was the smallest model in the Solid-State Apache line up.
I have one of these, mine is older though, it is a 1974 Mesa.
They were very well made, the box is aluminum and the fold-up sides are ABS plastic, lighter than fibreglass.
The unladen weight
of that trailer would be approximately 1450 LBS, they tow really good, I found it lighter and towed easier than my 76 Boler
I also have a 1965 Apache tent trailer, it is extremely light
, aluminum box and canvas, I bought it in Ontario and towed it home with a 92 Ford Festiva.