I had a metallic purple dune buggy from this line as a kid... I also remember a set of four egg-shaped Tonkas that my little brother had around the same time... If my memory is correct it was around 1973... I also seem to remember that my mother may have purchased these through either Avon or from the S&H Greenstamps store... I wish I had more information for you but that is about all I can remember... Good luck in your quest...

Dave Brisco