Source of 1874 Logo

Keuffel & Esser produced slide rules and imported planimeters for over 100 years. This web site is provided to help slide rule and planimeter collectors understand the works of this great American manufacturing company. It tells the story of a company and industry that evolved over five generations.


Cross Reference Indexes:

Pictures of Actual Specimens:

Dating K&E Slide Rules:

Cleaning K&E Slide Rules:

Instruction Manuals:

Special K&E Presentations, Brochures, and Articles About K&E:

Slide Rule Collecting Groups:

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