Built in Portland, Oregon
I have seen one before in person, was a 1962, and I have seen a few online. As early as a 1950's and then there is yours which is the latest at 1968. Yours is also the only rear door one I have seen. There is pictures of a 1960 at:
Has the SAME Safari decal as yours!
I just purchased a 1974 safari trailer. Also 13ft. I was looking for more info on them and came to this! Mine also has a rear door. I can post pics later if interested. Some of these posts seem from a while back….but if anyone has found anthing more out about them I'd love to hear! thx, becky