Rare test issue, with art by Basil Wolverton. Of the 18 posters originally intended for the set, it is believed that only 12 were published, as there are no copies of 2, 9, 10, 13, 14, or 18 known to the hobby. This poster is the nicest of the ones consigned for this auction - there are some tiny (less than 1/4") tears on the right side, and there is an additional heavy crease just below the center factory fold.