(The following was recovered from Web.Archive.org and was originally posted on robotmonstertoys.com.) Optimus Prime Fist G1 Optimus Fist G1. For more information on Optimus Prime Variations go to Fred's Workshop. Variations of G1 Type 2 Purple Fist: No Number 2 lines on thumb   Number 3 Smooth thumb No number Smooth thumb Number 4 Smooth thumb Reproductions - 99.9% of home-made reproductions are made a singe unite and were never attacked to a parts trees like this: Therefore, there most likely will not have any flash protruding were they were cut from the tree like an original part might have. Type: G1 Type 2 OP #4 CLUES: Mold mark on back or palms and stems - no plastic tree flash Manufacturer: KCC - early work Type: G1 Type 2 OP CLUES: no plastic tree flash -  lighter blue in color Manufacturer: KCC - More recent work