This listing is for a vintage US Department of Commerce Metric Conversion Card Published by the National Bureau of Standards, Washington, DC. This is the NBS Special Publication 365, Revised November, 1972.
It is the size of a credit card. Conveniently fits in your wallet or pocket. It is loaded with all types of Measures including the following:
- Length
- Area
- Mass (weight)
- Volume
- Temperature
One side is in Inches, the other is in metric. This is a great piece to add to a collection. Thanks for looking. Offers welcome.