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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU550Linear
4082-3
4262
1
Log Log Duplex Decitrig Special RadioKeuffel & EsserUSA
693103
Engine divided celluloid laminated mahogany
"10"
1940
C5

Notes: "Special radio version of 4081-3 with the K scale replaced by a F scale (frequency scale). No model number. Patent notation: PATS. 1,488,686 1,930,852 PAT.PEND."

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