Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU220Linear
4110
4408
n/a
Power TrigKeuffel & EsserUSA
800008
Engine divided celluloid laminated mahogany
"13"
1941
C4

Notes: Special sliderule meant to be an improvement of Mannheim type and easier to use since all scales are on one side. C&D scales have two cycles and A&B scales have four cycles. S&T scales have greater range. Log Log scales (P&F) are unsegmented making them easier to use.

Click on the Condition Code to obtain more details.