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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU213Linear
N4058C
4155
5
Beginner'sKeuffel & EsserUSA
n/a
Boxwood w/printed scales
"10"
1930
C1

Notes: "Model number moved from front to back of slide rule above the conversion table. Same as model 4058, match no. 4156 variant no. 2, but with frameless glass indicator with wooden guides."

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