Well the ribs are wide spaced and thinner, for one. The communicators had a extra little bit that caught the lid while open as well. This is a decent fake. One of the casts of the push buttons I have has the bubble in it as well. For me the couple things that kill it for me is, the originals had the tops of the push buttons painted- grey, this one isn't. I know my STV communicator came from Richard Coyle he did a small run of them at one point.