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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU145Linear
4088-1
4296
n/a
Polyphase DuplexKeuffel & EsserUSA
54482
Engine divided celluloid laminated mahogany
"5"
1923
C5

Notes: Pocket version of polyphase duplex sliderule. Frameless glass indicator with plastic guides.

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