Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU049Linear
68-1497
4194
n/a
Polyphase Duplex DecitrigKeuffel & EsserUSA
500362
Engine divided celluloid laminated mahogany
"10"
1968
C3

Notes: "Unbreakable indicator (plastic replaces glass window). Model number changed to new designation (i.e. 68 for slide rule, 1497 for unique model number). "

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