455 Martinson, Los Angeles
8 (043) 567 - 89 - 30
support@email.com

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

Search my slide rule collection

Search by maker

Search by keyword

Search my tech papers

Interested in finding out more about this calculating wonder? Then try one of the related articles (often light-hearted) I have published.
Go to the search my tech papers page.

Search results: Click on any Maker listed in the leftmost column for that model's full specification OR hover over its "Thumbnail" (if shown) for a pop-up enlargement of the image

You searched for: GPO

Maker	Model	Type	Material	Comments	Thumbnail
Unique	TER No.1	Cabling	wood/paper coated with plastic laminate	1/5 set for calculating the Transmission Equivalent Resistance for 50 V. BALLAST in General Post Office (GPO) telephone cable design - overall longer & wider than standard 10” models - table of supplemental factors on back
Unique	TER No.2	Cabling	wood/paper coated with plastic laminate	2/5 set for calculating the Transmission Equivalent Resistance for 50 V. NON-BALLAST and SIEMENS No. 16 in General Post Office (GPO) telephone cable design - overall longer & wider than standard 10” models - table of supplemental factors on back
Unique	TER No.3	Cabling	aliminium/wood/paper coated with plastic laminate	3/5 set for calculating the Transmission Equivalent Resistance for 40 V. C.B. in General Post Office (GPO) telephone cable design - overall longer & wider than standard 10” models - table of supplemental factors on back
Unique	TER No.4	Cabling	aliminium/wood/paper coated with plastic laminate	4/5 set for calculating the Transmission Equivalent Resistance for 22 V. C.B in General Post Office (GPO) telephone cable design - overall longer & wider than standard 10” models - table of supplemental factors on back
Unique	TER No.5	Cabling	wood/paper coated with plastic laminate	5/5 set for calculating the Transmission Equivalent Resistance for all exchanges in General Post Office (GPO) telephone cable design - overall longer & wider than standard 10” models - table of supplemental factors on back