Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU200Linear
68-1608
4142
n/a
Polyphase Mannheim AdjustableKeuffel & EsserUSA
510249
Engine divided celluloid laminated mahogany
"20"
1961
C4

Notes: Unbreakable indicator (perhaps a replacement for narrow indicator). Model number changed to new number system (68 to designate slide rule and 1617 to designate unique model number).

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