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Postal Telegraph and Cable Co. polar relay

Postal Telegraph and Cable Co. polar relay

Usage conditions apply
Currently not on view
Object Name
Relay, Polar
polar relay
Western Union Corporation
overall: 6 3/4 in x 3 3/4 in x 3 3/4 in; 17.145 cm x 9.525 cm x 9.525 cm
ID Number
accession number
catalog number
Credit Line
from Western Union Corporation
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
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