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Keuffel and Esser No. 7279 Linear slide rule 2004.010.0699 Keuffel & Esser Co. View |
Keuffel and Esser Linear slide rule 2004.010.0705 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Mannheim 9050-1 5" Linear slide rule 2004.010.0708 Keuffel & Esser Co. View |
Keuffel and Esser Linear slide rule 2004.010.0714 Keuffel & Esser Co. View |
Keuffel and Esser Linear slide rule 2004.010.0715 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig 4080-3 10" Linear slide rule 2004.010.0716 Keuffel & Esser Co. View |
Keuffel and Esser Mannheim "POWER TRIG" Slide Rule 4110 13" Linear slide rule 2004.010.0718 Keuffel & Esser Co. View |
Keuffel and Esser Mannheim Beginner's Slide Rule N4058W 10" Linear slide rule 2004.010.0719 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig 4081-3 10" Linear slide rule 2004.010.0720 Keuffel & Esser Co. View |
Keuffel and Esser Mannheim "POWER TRIG" Slide Rule 4110 13" Linear slide rule 2004.010.0726 Keuffel & Esser Co. View |
Keuffel and Esser D36 Linear slide rule 2004.010.0729 Keuffel & Esser Co. View |
Keuffel and Esser C419 Linear slide Rule 2004.010.0730 Keuffel & Esser Co. View |
Keuffel and Esser C423 Linear slide rule 2004.010.0731 Keuffel & Esser Co. View |
Keuffel and Esser C420 Linear slide rule 2004.010.0733 Keuffel & Esser Co. View |
Keuffel and Esser "Challenge" N9725 1/2 drafting set 2004.010.0744 Keuffel & Esser Co. View |
Keuffel and Esser Pounce for Tracing Cloth 2004.010.0746 Keuffel & Esser Co. View |
Keuffel and Esser Universal Duplex Slide Rule "prototype" 4090 10" Linear slide rule 2005.013.001 Keuffel & Esser Co. View |
Keuffel and Esser Braille slide rule 2006.011.001 Keuffel & Esser Co. 1952-1955 View |
Keuffel and Esser Log Log Duplex Decitrig 4053-3 10" Linear slide rule 2008.007.002 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Duplex with clam shell cursor 4083 16" Linear slide rule 2008.010.001 Keuffel & Esser Co. View |
Keuffel and Esser Doric Lettering Set 61 3135 2008.022.002 Keuffel & Esser Co. View |
Keuffel and Esser Thacher's Calculating Machine Type II 4012 cylindrical 2009.034.001 Keuffel & Esser Co. View |
Keuffel & Esser 68 1944 polyphase classroom demonstration linear slide rule 2013.013.002 Keuffel & Esser Co. View |
Keuffel & Esser Deci-lon classroom demonstration slide rule 2013.013.004 Keuffel & Esser Co. View |
Classroom demonstration slide rule 2013.013.014 Keuffel & Esser Co. View |
Keuffel and Esser 101 classroom demonstration linear slide rule 2013.013.015 Keuffel & Esser Co. View |
Keuffel & Esser Deci-Lon 5 pocket slide rule 2013.013.031 Keuffel & Esser Co. View |
Keuffel & Esser 4088-3 linear slide rule 2013.013.034 Keuffel & Esser Co. View |
Keuffel & Esser 4080-3 linear slide rule 2013.013.066 Keuffel & Esser Co. View |
Keuffel & Esser Deci-Lon 5-inch linear slide rule 2013.013.087 Keuffel & Esser Co. View |
Keuffel & Esser Overhead Projection Deci-lon 68 1955 slide rule 2013.013.093 Keuffel & Esser Co. View |
Keuffel and Esser Thacher's Calculating Machine Type II 4012 cylindrical IN-1081 Keuffel & Esser Co. 1886 View |
Keuffel and Esser Log Log Duplex 4092-3 10" Linear slide rule IN-1154 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig N4081-3 10" Linear slide rule IN-1190 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig linear 10" slide rule IN-1286 Keuffel & Esser Co. View |
Keuffel and Esser Mannheim Merchant's Slide Rule 4150-1 5" Linear slide rule IN-1539 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Vector 4093-3 10" Linear slide rule IN-1542 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Vector 4083-5 20" Linear slide rule IN-1543 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Duplex 4088-3 10" Linear slide rule IN-1550 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Duplex 4088-2 8" Linear slide rule IN-1552 Keuffel & Esser Co. View |
IN-1559 Keuffel & Esser Co. View |
Keuffel and Esser linear 7" slide rule IN-1563 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig 4081-3 10" Linear slide rule IN-1569 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Duplex 4088-3 10" Linear slide rule IN-1578 Keuffel & Esser Co. View |
Keuffel and Esser Mannheim "Pocket" Slide rule 4098A 5" Linear slide rule IN-1659 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Duplex 4088-3 10" Linear slide rule IN-1660 Keuffel & Esser Co. View |
Keuffel and Esser Polyphase Mannheim N4053-3 10" Linear slide rule IN-1662 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Vector 4083-3 10" Linear slide rule IN-1696 Keuffel & Esser Co. View |
Keuffel and Esser Log Log Duplex Decitrig N4081-3 10" Linear slide rule IN-1719 Keuffel & Esser Co. View |
Keuffel and Esser Fuller spiral slide rule IN-1911 Keuffel & Esser Co. View |
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