Ballantine type 300 alternating current voltmeter
date: label: Date made
content: ca 1938
name: label: maker
content: Ballantine Laboratories, Inc.
notes: label: Description (Brief)
content: Laboratory AC voltmeter used at the Naval Research Lab during World War II.
label: Location
content: Currently not on view
place: label: place made
content: United States: District of Columbia, Washington
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from U.S. Naval Research Laboratory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325632
label: catalog number
content: 325632
label: accession number
content: 256738
objectType: label: Object Name
content: Voltmeter
label: Other Terms
content: Voltmeter; Measuring Devices
physicalDescription: label: Measurements
content: overall: 5 in x 6 in x 11 1/4 in; 12.7 cm x 15.24 cm x 28.575 cm