Early big box telephone by Alexander Graham Bell at National Museum of American History. Washington, DC.

Early big box telephone (1876) by Alexander Graham Bell at National Museum of American History. Washington, DC.

Early big box telephone (1876) by Alexander Graham Bell at National Museum of American History. Washington, DC.
Photo by Jim Steinhart © 2013, all rights reserved. (Ref: DCMIX06)

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Smithsonian National Museum of American History, Washington, DC