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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU509Linear
4041F
4065
n/a
Mannheim AdjustableKeuffel & EsserUSA
906
Engine divided celluloid laminated mahogany
"10"
1913
C5

Notes: Graduated as finely as a 50 cm slide rule (e.g. 4051). Model number <4041F> added to left end of slide. Font of patent notation in slide well reduced in size. OUNCES : GRAMMES changed to OUNCES : GRAM'S on conversion table.

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