Vintage Collectible Keuffel & Esser Slide Rule

Manufacturer: Keuffel & Esser Co.

Vintage Keuffel & Esser slide rule.

Patented, Made in USA, patents 1.934.232 on the ruler and 2.086.502 on the curser.

Number N4053-3 on the ruler

On the leather case PAT 2.000 237

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If it is made of precious metal and or gems, we guarantee it to be as described

We check each item for broken parts or damages before listing, but we may sometimes miss small things. 

We do our best to list any details that we find in our description. 

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