Barron's 707

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Barron's No. 707 Metric Converter

Obverse
Obverse
Reverse
Reverse
  • Type: Straight Slide Chart
  • Size: 8 Inches / 20 cm
  • Material: Paperboard
  • Scales:
    • Front: Several logarithmic unit conversion windows
    • Back: Several tabular unit conversion windows, Linear temperature conversion

Inch and centimeter scales in front. In 1976, during the week the United States seriously considered adopting the metric system, these converters were produced by the million. They've all but disappeared. I obtained this specimen in 2005 from the University of Washington Bookstore. Who knows how long it languished there.

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