calibrator, surface roughness
date: label: date made
content: ca 1950
notes: label: Location
content: Currently not on view
place: label: place made
content: United States: Michigan
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
creditLine: label: Credit Line
content: Arthur F. Underwood
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.334957
label: catalog number
content: 334957
label: accession number
content: 317988
objectType: label: Object Name
content: Calibrator, Surface Roughness
label: Object Name
content: Calibration Standard
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: gold-plated steel plate - from catalog card: 3/8 in x 2 1/4 in x 4 3/4 in; .9525 cm x 5.715 cm x 12.065 cm
label: Measurements
content: overall: 2 1/4 in x 4 3/4 in x 3/8 in; 5.715 cm x 12.065 cm x .9525 cm