Originally Posted by 405billc
What is the diffrence between 1978 Argosy 28ft & Airstream 28 ft and what year did they start gray water tanks.
One of the most remarkable differences if your coach happens to have the rear beddroom is the wrap-around rear window with the deep-wrap wing windows. This is a feature that wouldn't appear on Airstream rear bedroom coaches for several years.
Floorplans between the two coaches of similar size and vintage are quite comparable. Manufacturers of the major appliances, optional air conditioner, and system components such as furnace and water heater would be the same between the Argosy 28 and the Airstream Ambassador. Due to the more modest list of standard features, the base empty weight of the Argosy was often somewhat less than the comparable Airstrea; but that difference could quickly disappear depending upon options selected.
Good luck with your research!