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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|A.W. Faber-Castell||Laukhuff Orgelpfeifen||Desktop Music Organ Pipes - System Rensch||thick plastic||
Special commission for German organ builder Laukhuff (still operating) for scaling organ pipes (wood/metal flues & reeds) - superb quality but only 500 ever made - Orgelbau-Verlag started selling their own (inferior) version in 1986
|Blundell Harling Ltd. (BH)||P3679||Music Chord Computer||plastic/metal||
Slide chart specially commissioned by UK copyright holder Dudely Fulller Associates - design invented by musician Dudley Fuller
|Blundell Harling Ltd. (BH)||P5731||Music Note Tracker||plastic||
Slide chart made for UK patent holder (GB2245409) Peter Davies.
|Festus Mfg. Co. / Acu-Rule Mfg. Co.||Acu-Rule MR700 Mu-Stick||Music chord finding & key transposition||plastic||
Unlike any other Acu-Rule or music type - design copyright Mel McSwain - sole distributor: McSwain Co., Arkansas
|Lawrence Engineering Services||9-K||Music Transposer||Wood/painted||
For constructing chords in any key & transposing one key to any other
|Lawrence Engineering Services||L.E. Waddington||Music & Music Acoustics||wood/painted||
For adjusting relative vibration rates, degrees of scale, intervals, chord structures, scale indications & transposition data against a piano keyboard - based on several standard frequency level specifications - layout © L.E. Waddington - Reference Frequency table in well - Subscript Notation, Instrument tables, Time Signatures & nomograms on back
|Lawrence Engineering Services||Thomas||Music Composition & Transposition||wood/painted||
For composing, transposing or creating harmonies - layout © Thomas
|Orgelbau-Fachverlag||(NoName)||Desktop Music Organ Pipes - System Rensch||thin plastic||
Made for German specialist publisher: Oreglbau-Fachverlag. For scaling organ pipes (wood metal flues & reeds) - orignal limited OEM higher-quality version by F-C. Table of frequencies on back.