Cobalt EC&M Telegraph Insualtor
date: label: date made
content: ca 1875
name: label: maker
content: Electrical Construction & Maintenance Company
notes: label: Location
content: Currently not on view
place: label: place made
content: United States: California, San Francisco
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Communications
creditLine: label: Credit Line
content: from A. E. Roome
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.231781.2
label: catalog number
content: 231781.2
label: accession number
content: 43532
objectType: label: Object Name
content: Insulator
label: Object Name
content: CD 123 Insulator 123ECM040
label: Other Terms
content: Insulator; Insulation
physicalDescription: label: Physical Description
content: cobalt blue (overall color)
label: Physical Description
content: glass (overall material)
label: Measurements
content: overall: 4 1/2 in x 2 1/2 in; 11.43 cm x 6.35 cm