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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU504Linear
4053-5
4132
n/a
Polyphase Mannheim AdjustableKeuffel & EsserUSA
59820
Engine divided celluloid laminated mahogany
"20"
1923
C5

Notes: Frameless glass indicator with celluloid/plastic guides. K moved to front face of slide rule below D scale and centimeter scale added to lower edge. Notations moved above A scale.

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