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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU443Linear
4101
4392
2
StadiaKeuffel & EsserUSA
1
Engine divided celluloid laminated mahogany
"20"
1910
C5

Notes: Early stadia model without indicator. Model number on left end of slide. Celluloid laminate in slidewell with patent notation. Instruction on back runs length of slide rule. Company notation font reduced in size.

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