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  • Babe Ruth & Tom Mix Keystone Eye Comfort stereoscopic testing view 1920s
  • Babe Ruth & Tom Mix Keystone Eye Comfort stereoscopic testing view 1920s

Title   Babe Ruth & Tom Mix Keystone Eye Comfort stereoscopic testing view 1920s

Seller ID   1477379

7 x 3 1/2" curved stereoview used in conjunction with an eye exam device. Writing on back hard to scan, but here is all of it: "The Keystone Eye Comfort And Depth Perception Series - For the Development of Comfortable Vision and a Zhigh Degree of Depth Perception. / E C 109-33290 Fusing the two upper images requires 14 prism diopters divergence (prism B) / Fusing the two lower images requires 19 prism diopters divergence (prism B) / Keystone View Company Meadville Penna. Printed in U S A."

Dimensions given, if any, are approximate. Condition as shown. Defects not visible in scan[s] are described. Item is complete as issued unless otherwise stated. NO facsimiles, copies, reprints or reproductions unless specifically stated in description above. Pictures show actual item, never a stock image.

Price = 92.99 USD



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