While there are 18 Philadelphia Athletics players in this set, it should be assumed that each can be found in three different variations. Each of the 1-1/2" X 2-3/4" cards can be found with a plain portrait lithograph on front, with either a blank back or a back containing a Nadja ad. Each player can also be found with a black overprint on front, comprised of a white elephant figure on the uniform and the notation "World's Champions 1910" above. The overprinted cards are known only with blank backs, and are somewhat scarcer than the plain cards of either type. Nadja-back cards should be valued about the same as the overprinted type. Shown above is HOFer Chief Bender in fair condition with creasing. However, the color is vibrant and the center is great.