Darin, You have created several different posts asking pretty much the same thing, which will mean various answers in various thteads. I will not reply to all of them. Airstream made the 22' Flying Cloud with many different floorplams during the 1950s. Not all of them showed up in brochures. They did also make some customs in various lengths.. You seem to have a 1957
Flying Cloud based upon the serial number you provided in a different post. It may have a "custom" badge if it is a custom.
You will not get any good answers until you post some photos of the trailer.