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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU539Linear
N4083-3
4269
1
Log Log Duplex VectorKeuffel & EsserUSA
536072
Engine divided celluloid laminated mahogany
"10"
1950
C5

Notes: "Major scale change: L and LL1 scales replaced with LL02 and LL03 scales on front side, upper stator. L, LL01, and LL1 scales replace LL0 and LL00 on back side, upper stator. All notations except model number moved to top edge. Scale legends added to right end of slide. N added to model number. "

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