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~Dalton Dead Reckoning Computer Circular Slide Rule Weems E-6B~

You are looking at a Dalton Dead Reckoning Computer. Also know as a Circular Slide Rule. Model E-6B. Made in USA by Weems System of Navigation, Annapolis, Maryland, 1959. Made of white plastic, this is the commercial aviation version. Comes in it's original leather case. In very good condition.