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Telegraph crossarm, pin and insulator
National Museum of American History

Telegraph crossarm, pin and insulator

ca 1849

overall: 10 in x 8 1/4 in x 3 1/4 in; 25.4 cm x 20.955 cm x 8.255 cm
National Museum of American History
CC0 — Public Domain
National Museum of American History

Currently not on view

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