Mystery...Can someone pls solve-what is the make/model/year?

Hello and Welcome,

This trailer is very unusual. Specially, the lack of a front window and the a breaks in the skin appear unusual as well. The front curve reminds me of modern day trailer fronts. I noticed your screen name. Tells me you are most likely Canadian. That would lead me to believe that this may be a Canadian built trailer that you are looking at to buy.

From my experience with seeing Canadian built trailers introduced here on the forum is some of them look unusual or different than what we might see here south of the border. It's hard to judge quality of build from the quality of the photo provided. If you are an interested buyer, you need to see interior photos to assess water damage. They all have water damage unless it spent much of its life covered with a structure. The aluminum skin hides a lot.

Do you have any photos of the interior?

There is very little information out there on Canadian built trailers.

As to the age, it's a little bit of a tough call for me anyway. Might be very late 50s into @1965. Others may disagree. The jalousies seem a bit unusual for this trailer, though are most likely original. Generally, there will be a faded "badge" or a sticker above a front window or above the rear window.

Also, if you are interested in buying this trailer make sure it has paperwork with it that will allow you to register it with your Department of Motor Vehicles. It may not have the proper papers. Research this before you or anyone else buys a trailer.

Rod

(more pictures might help...)

For the interior paneling to appear as coming from one sheet as you experienced is typical.  The only difference here is that the darker brown paneling shows that it's more likely not a 50s trailer which were often had constructed with birch or ash paneling.  This is a later trailer probably from mid 60s or later.

The z stripe found on one side could be due to the long time placement of this trailer.  When a trailer sits with one side.
facing the sun, the paint on that side can fade.

Be prepared for a lot of time, energy and $$ to bring this trailer back to towable condition.  Trailers left in the open for years often have tiny four legged inhabitants that can set up camp and use the trailer as a bathroom.  So, there is that and the time, energy and cost to make this trailer safe for the road.  Make sure you have a protected area to work on the trailer.  Also, makes sure you can title the trailer.  I don't know if not knowing the make of the trailer will be a problem in your area. You don't want to get stuck with the trailer that you can't title.

Cheers,

Rod