The trailer is the photo you posted is not a Trailswest Campster
. The overall shape is similar but the details of the lower half are completely wrong. As is the shape of the window on the side of the trailer.
There was only one model and body style made.
There was an option for an electric compressor fridge
versus a fridge
that you had to put block ice into for keeping things cold.
Also there was an option to have a furnace
that was located in the cabinet under the sink.
Another option was a cleat on the outside of the wall so that the dinette table could be hooked onto that cleat for outdoor use.
There is an image of the brochure for the Campster
in the document section of this forum.
There is also an image in the forum files of a newspaper interview with the founders of the Trailswest Campster business. Here is a link to that image.