Congratulations! I don't think it's a Scamp* or a Boler- the rear taillight housings vaguely remind me of one of the other Boler
clones, but I can't remember off-hand which. With this one it's hard to be sure what's original.
Clearly you've got some work ahead of you. Replacing windows
is not trivial. You'll have to take the measurements of the openings and see what you can find at local or online RV salvage yards. Finding something slightly oversized is easier than filling in fiberglass for a smaller replacement.
*Scamp makes molded fiberglass travel trailers. Skamper made conventional tent trailers, truck campers, and a few travel trailers from 1962 to 2003, when they went out of business. Thor owns the rights to the name.