What early is the mystery machine?

Here is an interesting article about what early the mystery machine is:
http://jalopnik.com/public-service-announcement-the-mystery-machine-is-not-1723185791


What do all you early experts think?

I always thought of it as a collection of 2nd gen chev, econoline and a100

I was about the post this article too!

I think it kinda looks a lot like all of them (VW and Greenbrier included). Without really looking like any of them.

being that every thing about the tv series is a cartoon i say it's a cardboard box