Slide Rules

Slide Rule Collection

Mike Syphers

Most recent listing

10" and 20" K&E slide rules

Sample Rules...

Keuffel and Esser, USA

Pickett, USA

Hemmi/Sun, Japan

(and Post, USA)

Dietzgen, USA

Faber-Castell, Germany

Lawrence / Engineering Instruments, USA

Sterling, USA

Others

Fuller’s Calculator Model No. 1

Boykin RotaRule Model 510

Routledge Engineer - Bolton

Richardson's Direct Reading

Takeda No. 28

Otis King Model L

Goodyear Promo

Gilson Midget