
Gearlock sets by Bullmark
Not quite vinyl I know
But these sets are pretty fun.

You connect the little gear blocks on the base and stack towers with missile launchers and stuff.
You add a crank and make it all work and turn.
I used to see these in the catalogs, but could never get the toys as a kid.
From what i heard, it's one of the toy lines that lead to the bankruptcy of Bullmark.
I can see why, they were very expensive for the time, and the design is very "half baked" in many regards.
(The way parts link is very restricting on the playability! Not enough interchangeability between parts, ect)
Which is quite surprising. It was quite a cool concept.
.
The Mach Baron is part of the line, he goes with the "Control tower" set, which I have yet to find.
All the Mach Barons I have seen are clear blue, and have yet to see a plain clear one like on the Box and in catalogs.
Here's a slide show, you will see I had to reproduce 2 missing parts
http://www.flickr.com/photos/paulkaiju/sets/72157626303434965/show/