Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU364Linear
N4133
4421
n/a
Roylance ElectricalKeuffel & EsserUSA
528578
Engine divided celluloid laminated mahogany
"8"
1937
C5

Notes: "Improved glass indicator with three cursor lines. Patent notation removed from slide well and changed to patent number on front of slide rule (i.e. 1,934,232). Also patent notation moved to center position; company notation moved to left."

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