Argosy trailers and Motor Homes were built by Airstream, mostly in a separate plant located in Versailles, Ohio. They followed the basic Airstream design with several differences. The Aluminum is painted and the end caps are one piece steel not segments of Aluminum. Some new concepts were tried on these units. I believe the plant was shut down around the time that Airstream changed owners.
There are plenty of these units on the road, but I have no idea what the production numbers were.
Wally Byam Airstream Club 7513