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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU159Linear
4081-3
4236
n/a
Log Log Duplex DecitrigKeuffel & EsserUSA
592708
Engine divided celluloid laminated mahogany
"10"
1938
C4

Notes: "Reverse scale order is LL00 LL0 A on upper stator. Patent notation: PATS. 1,488,686 1,930,852 PAT.PEND."

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