The original modern POTF coin.  During the creation of the line, the original size of the coin was deemed to be about 25mm, however, during the pre-production process, it was decided to move to a larger 39mm coin to add perceived value to the Power of the Force line of figures.  Probably the most plentiful coin prototype in existence today.  Notice the difference in the back design of the coin, including the bust of Yoda (the same bust is also on the normal Yoda coin).  The front of the coin also exhibits a change in the design, in that the planet with the rings is not on the produced Luke X-Wing coin.