Keuffel & Esser Co. Favorite Slide Rule Vintage with original case.

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Keuffel & Esser Co. Favorite Slide Rule Vintage with original case.:
$3.92

What a great piece of History. This vintage Keuffel & Hesser Co. Favorite Slide Rule is in excellent condition. The original box shows a little ware and tare, but for the age is in good condition, one end of the box is only attached to one side. It has many conversions and important pieces of information for using the slide rule on the reverse side of it. Great item.