Object Details
- Location
- Currently not on view
- Data Source
- National Museum of American History
- date made
- ca 1950
- Credit Line
- Arthur F. Underwood
- Physical Description
- cardboard (box material)
- Measurements
- 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
- overall: 2 1/4 in x 4 3/4 in x 3/8 in; 5.715 cm x 12.065 cm x .9525 cm
- Object Name
- Calibrator, Surface Roughness
- Calibration Standard
