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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU031Linear
N9081-3
4241
n/a
Log Log Duplex Decitrig - Doric PlasticKeuffel & EsserUSA
58122
Engine divided white xylonite
"10"
1949
C5

Notes: All plastic version of the 4081-3 Log Log Duplex Decitrig sliderule. Improved glass indicator. DORIC trademark. All black numbers with scale labels slanting backward or forward in direction of increasing scale values.

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