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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU091Linear
N4053-5
4696
n/a
Polyphase Mannheim AdjustableKeuffel & EsserUSA
131566
Engine divided celluloid laminated mahogany
"20"
1925
C5

Notes: "Frameless glass indicator with celluloid/plastic guides. Conversion table changed to USBS Circular 47 version with notation below table and table label reduced in width to same as on the 10" slide rules."

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