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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU528Linear
4100
4382
n/a
StadiaKeuffel & EsserUSA
3T
Engine divided celluloid laminated mahogany
"10"
1903
C5

Notes: Early version of 4100 stadia slide rule with no indicator and no scales on back of slide. Patent notation in slide well on celluloid laminate. Company notation between scales on slide on left. Directions for use on back side with K&E.

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