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Type | Model No. | Maker | Country | Construction Material | Date | Scale Length | Area of Use |
Linear | K & E /4092-3 | Keuffel & Esser | USA | Celluloid over wood | 1925 to 1938 | 25 cm | Engineering |
Notes: "The 4092 was K&E’s first log log slide rule, introduced in the 1909 catalog and produced until 1921. The 4092 was succeeded in 1922 by the 4092-3, which added four more scales and a more useful scale arrangement. In 1925 a K scale was added, and the 4092-3 made its last appearance in a K&E catalog in 1938. This 4092-3 has a K scale, so it was made between 1925 and 1938. "
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