Excella Interior Layout Variations

[JimGolden]

Hi everyone,

Was just looking at the vintage airstream site and I checked out every year of Excella 500 from 1973 through 1979. Every year, with the exception of 1977, has the stove and sink on the curb side. Only 1977 has it on the street side. As well, only the '77 appears to have had the curving counter, whereas all the years before and after are straight.

Why is this?