Archive of Collections



Details and Image



TypeModel No.MakerCountryConstruction
Material
DateScale LengthArea of Use
Linear
Keuffel & Esser / 4181-1 Log Log
Keuffel & Essor
USA
Plastic
1940's
10 cm
Engineering

Notes: "The K&E 4181-1 slide rule is the all-plastic, pocket-size version of the ubiquitous 10-inch 4081-3 Log Log Duplex Decitrig, with the exact same set of scales and scale arrangement. Itís a little bit chunky for a pocket slide rule, but about the same size as the Post 1461 Pocket Versalog or Ricoh 551 (also sold as the SIC 5510 and Lafayette 99-7099 Decima Log). "


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