Looks like a mid to late 30's trailer.
It is similar to a Jim Dandy, or Pierce Arrow, though at that time there were quite a number of "do it yourself" plans available.
Jim Dandy was one, Hammerblow tool company was another.
Though rusted, and rotted, the trailer may well be worth going for, if not to restore, for parts.
Rob
Stan, it probably is masonite, but the "curl" in the front is supposed to be there.
The body covers most of the tongue in an attempt to make it more streamlined (Art Deco going on at that time).
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...