My brother's friend found some of his old toys and gave them to me. He gave me a dinobot sludge. He told me he got it from japan before the dinobots were introduced into the cartoon. I have a g1 dinobot and noticed the neck is slightly different. The left is the one my friend gave me and the right is the old 1980's us version. Notice how the mold on the neck has a spot for the autobot sticker and the other one does not have one.