Object of the Day

Blind Distance Table Cards

We have come across several of these laminated card sized charts in our collection.  Both sides feature similar information and graphics.  However, the records do not have any more information about them.1999.024.021.002Have you, or anybody you know, used this card before?  When did you use them?  Are they still in use?

Is it something that was commonly used?  Did you carry it in your wallet or pocket?

We are looking for more specific information about these cards and how they were used.  If you have any knowledge of these laminated cards, please share with us in the comments section!

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