Telegraph polar relay
name: label: Maker
content: Western Union Corporation
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Western Union Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.331137
label: accession number
content: 294351
label: accession number
content: 294351
label: catalog number
content: 331137
objectType: label: Object Name
content: Relay, Polar
label: Object Name
content: polar relay
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 5 1/2 in x 5 1/4 in; 13.97 cm x 13.335 cm