Measuring Knife

 

This is a unique steel and ivory measuring knife.  The handle of the knife has etched upon it a 3-inch ruler.  Overall, open, it measures around 4.2″ long x .25″ thick.  For source and more details, click here.

 

Image from: http://www.cr.nps.gov/museum/exhibits/revwar/guco/gucoroads.html

 

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