Some things about the Airstream some of the younger people may not know. The Airstream as we know it was built after WWII. During WWII there were no cars built and not many other things. Most factorys went to tank and aircraft production. After the war there were tons of dies, machines, tools and aluminum in the scrap yards as aircraft production went to little. Also thousands of people trained to build aircraft out of work. Some of this stuff was bought up by Airstream and some of the out of work people started to build the Airstream we know. Odds are the shape was from a bomber or transport plane dies and just redone to work for the trailer. There were lots of very skilled peope to build them. They were strong and did not twist and come apart like the wood frame trailers of the day. So they became the travelers trailer over just camp trailers. And were used and shipped all over the world for travelers going places with or with out roads. That was the start of the WBCCI. It was a one brand club and I think really had its hay day from the 50s - 80s, kind of a long run for a 1 brand club. They had their own Airstream only RV Parks and lots of factory backed tours. However by the 90s most of the people that enjoyed them were aging. The younger people were not buying them as they lacked the room of the box trailers. While the Airstream is still built today its shape changed in around the 90-s to be wider and have a bit more room. They do not compete with the box type rigs for room. But they are still the one rig people all over the world know..