Features four small photos. The top two photos show Ruth at the plate during a game, while the bottom photos show Western star Tom Mix jumping. The text on the reverse of the card reads "The Keystone Eye Comfort and Depth-Perception Series - For the Development of Comfortable Vision and a High Degree of Depth Perception. - E. C. 109 - 33290 Fusing the two upper pictures requires 14 prism diopters divergence (prism B. I.); Fusing the two lower pictures requires 19 prism diopters divergence (prism B. I.). Cpyright Keystone View Company Meadville, Penna."