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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU135Linear
4053-5
4131
n/a
Polyphase Mannheim AdjustableKeuffel & EsserUSA
25
Engine divided celluloid laminated mahogany
"20"
1921
C5

Notes: Frameless glass indicator with celluloid/plastic guides. K scale on lower edge of slide rule.

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