Vintage Keuffel and Esser Slide Rule
Keuffel and Esser 4081-3 Log Log Decitrig Duplex Slide Rule is a ten-inch mahogany duplex slide rule and is coated…
Cameras and Collectables
Keuffel and Esser 4081-3 Log Log Decitrig Duplex Slide Rule is a ten-inch mahogany duplex slide rule and is coated…