Quoted from WillSmuz8999:One tell tale sign it is not a prototype. In the prototype, Sean Connery's image near the right flipper does not say Dr Jones, it says DAD. Ask those looking for true prototypes, they know. This could be a sample game, not near as rare.
This is true, but his game does have prototype features i.e. the stainless rails....my guess is there were several games that left the factory with some of the prototype features. For example my game has the pre drilled hole and the factory board for the bridge lighting (which is nice to have). Apparently these didn't make the final production game. My game doesn't say "Dad" or have the stainless rails. Does that make my game a prototype? Its anybody's guess....