It sounds like it is a Minuet. The floor width should be 7'0" and flare out at the beltline. (The regular-width Argosys are 7'8" in floor width.)
Take a look at this brochure sheet
from the factory - it mentions "Minuet side windows which are awning-type Acrylic" on page 2.
There are other dimensions on that sheet to confirm what you have. Another way to tell - the Minuets have vinyl-clad aluminum furniture inside.
You can use plastic polish (as sold for car convertible rear windows) to polish the plastic windows. That might take out some of the haze and scratches. I got lucky - the windows in my lightly used trailer are pretty clear.
By the way, if you do have a Minuet - congrats! Well, congrats on having an Argosy anyway, but 24' Minuet 7.3Metre trailers are fairly rare.