Cast in a dense wax or resin, and hand-painted, these non-transforming prototypes were first shown to the public in catalogues at the tale-end of the Diaclone line, and later in a Transformers laserdisc's accompanying booklet.
Various angles of car mode. As you can see, this piece is solid.
Missing years on; the head for the robot mode prototype was actually that of a red Honda City Turbo's originally. It really is amazing that these prototypes survived at all.
Robot mode and flying car mode reverse
Magnificent pieces of history.