Keuffel and Esser Decilon, 68-1100
Keuffel and Esser Analon, 68-1400 Science Analysis.
Keuffel and Esser K12 Prep, 68-1892.
Keuffel and Esser 4035.
Keuffel and Esser Mannheim 4041. The top part of the image shows the embossing on the box.
Keuffel and Esser 4053-3.
Keuffel and Esser 4054.
Keuffel and Esser 4058.
Keuffel and Esser Beginner's Slide Rule N4058W.
Keuffel and Esser 4070-3
Keuffel and Esser 4071-3
Keuffel and Esser 4080-3
Keuffel and Esser 4081-3
Keuffel and Esser 4083-3
Keuffel and Esser 4088-3
Keuffel and Esser 4092-3
Keuffel and Esser 4093-3
Keuffel and Esser 4098A.
Keuffel and Esser 4139, Cooke Radio Slide Rule.
Keuffel and Esser 4153-1.
Keuffel and Esser 4961 Doric.
