Box 6
Contains 755 Results:
From 15 delta divergence in upper pictures to 10 delta divergence in lower pictures. Keystone View Company. Made in U.S.A. B02. EC 22. Keystone Stereoscopic Service. Copyright Keystone View Co., undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Fusion Amplitude: From 11 delta divergence in Upper Pictures to 5 delta Divergence in lower pictures. Keystone View Company. Made in U.S.A. B02. EC 23. Keystone Stereoscopic Service. Copyright Keystone View Co., undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Fusion Amplitude: From 20 delta Convergence in Upper Pictures to 26 delta in lower pictures. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Gamma Unit. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Locomotive with Engineer in cab. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Peeling Fallen Redwood Tree at the Butt, California. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Work or play! Which? - Even if it’s monkey business, Two eyes are better than one. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Huge Bombing Planes of the United States Army Air Corps at Mather Field, Sacramento, Calif. [California] Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Summer Time on the Playground. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.
Changing Fication from 7 to 4 requires 11.5 prism diopters of Positive Convergence. Keystone View Company, undated.
Many of the cards in this series are meant to be educational in nature. There are also some sets that are used for professional reasons. For example, the optometric community used stereographs to gauge vision and diagnose their patients.