By way of The Spacebridge on Facebook
, we can bring you a look at something rather cool. Back in the original Transformers Universe line in 2003, Hasbro had planned to release a redeco of G1 Thunder Clash / Machine Wars Optimus Prime as Motormaster. The line's unpopularity with retailers curtailed the plans and other than the occasional prototype, nothing has ever been seen of this toy.
Today, The Spacebridge has added some Hasbro Color Guides for this unreleased Universe Motormaster to his Prototype Transformers gallery
. These are the sheets used by Hasbro in determining the final deco, paint apps and other details - a rare look at the design process of any Transformers toy, but doubly so for one that was never released and is rarely seen. Be sure to check them out, along with all the other cool looks at rare and obscure items in that same gallery.