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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU125Linear
n/a
4479
1
Celanese CelconKeuffel & EsserUSA
004445
Engine divided Celanese light green resin
"5"
1968
C4

Notes: "Special slide rule made from a Celanese green resin. This resin is very durable, but difficult to work. Same scales as pocket model 68-1555 ( old 4168). Narrow unbreakable indicator has normal Ivorite plastic guides."

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