Keuffel & Esser slide rules with book and Paramount Products Roto-Rule

Vintage slide rule and rotary measuring device lot, including:

Keuffel and Esser Co. N4053-3 slide rule with leather case, with ownership inscriptions by T. Gallagher, Tufts College (1935 graduation) with manual (1944 copyright, some tanning and foxing on the cover)

Keuffel and Esser Co. Beginner's Slide Rule N4058W, well used

The Polyphase Slide Rule Self Teaching Manual by William E. Breckenridge, copyright 1924. Cover is well used and repaired.

Roto-Rule Rotary Measuring Device by Paramount Products of Ft. Wayne, Ind., with original package

CONDITION All are used, examine the photo.

This is a vintage item. It has been used and loved and it has a history. Please examine photos carefully and ask questions, as we are unable to accept returns or exchanges.