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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU567Linear
N4081-3
4239
1
Log Log Duplex DecitrigKeuffel & EsserUSA
486127
Engine divided celluloid laminated mahogany
"10"
1949
C4

Notes: "Patent #2,422,649 added after PATS.PEND. on the upper right edge of slide rule."

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