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U.S. Navy “big eyes” bridge binoculars. This naval observation device, which stands some 55 inches tall and measures 36 1/2 inches from eyepieces to objective lenses, has it all: elevation controls, focus adjustments, and a traversing mechanism. (Heritage Auctions)
![](https://www.historynet.com/wp-content/uploads/2021/01/MHQP-201000-PORT-SIGHT-11.jpg)