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NH 79349 German Goerz Panorama Periscope with Direction of Sight Dial

Photo #: NH 79349  German Goerz Panorama Periscope with Direction of Sight Dial
Title: German Goerz Panorama Periscope with Direction of Sight Dial
Description: Diagram of a periscope type developed prior to or during World War I. This is Figure 2 of The Science of Low Visibility and Deception as an Aid to the Defense of Vessels Against Attack by Submarines, by Lindell T. Bates. Published by the Submarine Defense Association, New York City, 1918. In 1974 the original volume was in Record Group 45 at the U.S. National Archives. U.S. Naval History and Heritage Command Photograph.
Catalog #: NH 79349
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