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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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You searched for: fisher blundell

Maker	Model	Type	Material	Comments	Thumbnail
Blundell Brothers/Rules Ltd. (BRL)	P1732/A	Fisher Universal Valve Sizing Mark III F	plastic	Copyrighted French version made for Elliott Automation based in Paris
Blundell Harling Ltd. (BH)	P2734A	Fisher Universal Valve Sizing Mark V	plastic	Copyrighted version made for GEC-Elliott Valves Limited
Blundell Harling Ltd. (BH)	P4743	Fisher Universal Valve Sizing Mark VIII	plastic	Copyrighted version made for Fisher Controls