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ARISTO 90117 specially commissioned Aqua-Math for calculating the water content of tobacco leaves
ARISTO 90107 specially commissioned model for calculating the lifespan of filament lightbulbs
Koch, Huxhold & Hannemann (KHH) - made the surprising System Korte slide rule that does addition & subtraction
Smallwood Folding Shoe Sizing Stick in metric for French shoe sizes 10-48 in increments of a Paris point (⅔ cm)
Lawrence MIT Antenna slide rule for radar antenna performance was classified during WWII by UK & US governments
ALRO-made ruler unusually with a cursor for analysing ECG printouts of the cardiac Sinus Rhythms
Hatters Gauge - for measuring the size of a hat but unusually calibrated in metric & imperial
Glovers Rule - for measuring the length of a glove in imperial inches
Unusual non-logarithmic QR 41 military model by Dennert & Pape (D&P) for training anti-aircraft gunners
Colour combinations slide rule made by German WH-Wohnen for Interior Designers
Professor Fuller’s Drum Calculator from 1878 - made by W.F. Stanley
Modern wristwatch with slide rule bezel calculator made by German maker Kienzle
Ruxton made Multi-Vider combined drop-lead pencil & slide rule
Rare Otis King Model N for Retail & Monetary with white scales (422 & 424) on a black background
Darnley’s Rotable Lightning Calculator/Pencil Case calculating aid
Makeba made Kombinator combination pencil & slide rule
Rare Carbic-made Fischer Calculator slide rule
Specialist slide rule for a national home cable radio broadcasting system offered in The Netherlands from 1930 to1970
Smallest drum (≈ 2.4m) made by renowned Swiss maker LOGA

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Interested in finding out more out about such calculating wonders? Then try one of the slide rule related articles (often light-hearted) I have published.
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Search results: Click on any Model listed in the leftmost column (or its image) for the full specification OR hover over its "Thumbnail" image (if shown) for a pop-up enlargement

You searched for: Keuffel & Esser (K&E)

Model	Type	Material	Comments	Thumbnail
4012 (type 2) Thacher's Calculating Instrument	Desktop Basic long-scale	metal/wood/paper	Special anniversary gift from Ros - serial no. 1685
4041 -early	Enhanced Mannheim	wood/celluloid veneers	3 adjustment screws & conversion table on back
4051	Desktop Enhanced Mannheim - early	wood/celluloid veneers	Batch no. 322 + 5 adjustment screws & conversion table on back
4054	Enhanced Mannheim - early	wood/celluloid veneers	Batch no. 125 + paper conversion table on back
4080-5	Desktop Decitrig Log-Log	wood/celluloid veneers/metal straps	Serial no. 445698
4081-5	Desktop Decitrig Log-Log	wood/celluloid veneers/metal straps	Serial no. 902506
4092	Log-Log - early	wood/celluloid veneers	Later versions had extra scales
4092-3	Log-Log	wood/celluloid veneers	Serial no. 626745 + Lutz Ferrando & Cia, Buenos Aires on front
4095-3	Business	wood/celluloid veneers	Serial no. 714097 but other versions had extra scales + index line up marks on back
Cooke Radio Slide Rule	Electronic	wood/celluloid veneers	Serial no. 865511 designed by Nelson M. Cooke that later became model 4139 + notes on electronic calculations by Ron Manley
N-4053-5	Desktop Polyphase Enhanced Mannheim	wood/celluloid veneers	N prefix = new/modified version & Polyphase = K&E name for Mannheim + serial no. 740727 + 5 adjustment screws & conversion table on back
N-4080-3	Log-Log	wood/celluloid veneers	Serial no. 508791
N-4088-5	Desktop Technical	wood/celluloid veneers/metal straps	N prefix = new/modified version + serial no.: 235840
N-4096	Desktop Merchants' Business	wood/celluloid veneers	N prefix = new/modified version + serial no. 699855 + stripped back scale layout for just x, ÷ & proportions + 5 adjustment screws & conversion table on back + with the lid open can be used in box!
N-4101	Desktop Stadia Topography - 360g	wood/celluloid veneers	N prefix = new/modified version + serial no. 106473 + 5 adjustment screws & conversion table on back
Short Base Triangulation	Desktop Military Artillery Range Finding	wood/painted	Specially produced chunky model with a Mannheim-like layout based on Mils - read more ...