Keuffel & Esser 4055 Favorite Simplex Slide Rule | National Museum of American History
File:Vintage K&E (Keuffel & Esser Co.) Polyphase Slide Rule, Model 4053-3, 10-Inch, Exposed Maghony, Made in USA (9610956770).jpg - Wikimedia Commons
Antique Keuffel & Esser Slide Rule with Case No 4094 Pat Number 1.934.232 USA | eBay
Keuffel & Esser 4080-3 Log Log Trig Duplex Slide Rule | National Museum of American History
Keuffel & Esser 4045 Mannheim Simplex Slide Rule | Smithsonian Institution
Keuffel & Esser Slide Rule Instructions (Annotated): International Slide Rule Museum Library Reprints - Volume 2 : Konshak, Michael Vaughn: Amazon.it: Libri
Keuffel & Esser 4092-3 Log Log Duplex Slide Rule | National Museum of American History
Keuffel & Esser 4088-3 Polyphase Duplex Slide Rule | National Museum of American History
Vintage Keuffel and Esser Slide Rule K and E 1925 Model - Etsy
Eric's Keuffel & Esser Slide Rules
File:Keuffel & Esser Model 4181-1, Log-Log Duplex Decitrig Slide Rule - MIT Slide Rule Collection - DSC03634.JPG - Wikimedia Commons
Keuffel and Esser, Standard Scales
K&E, Keuffel & Esser Vtg N4041 Slide Rule & Case, Pat'd June 5, 1900, USA | eBay
Keuffel and Esser Deci-Lon Slide Rule | National Museum of American History
Amazon.it: Keuffel & Esser Slide Rule Instructions (Annotated): International Slide Rule Museum Library Reprints - Volume 2 - Konshak, Michael Vaughn - Libri
Slide rule scale - Wikipedia
Keuffel and Esser, Standard Scales
Keuffel & Esser 4088-3 Polyphase Duplex Slide Rule | National Museum of American History
File:Keuffel & Esser slide rule, model 4081-3 (ca. 1940) - Detail.jpg - Wikipedia
Keuffel & Esser slide rules with book and Paramount Products Roto-Rule | NextStage Vintage
