Vintage Eicchorn Train Set - Large Scale

I was given this set sometime around 1980 (Late 70's - early 80s) and can find no mention of this train anywhere online even after extensive searches by both description and image. The cars are much larger than the typical eicchorn trains I typically see. They are approximately 12'' long by just under 5 inches wide. It comes with large plastic curved tracks as pictured. I would love to know any history of this line as well as what a set may be worth 

Fair