18th Oct, 2019 12:00

Fine Photographica & Instruments of Science & Medicine

 
Lot 78
 

A Rare Nautical Slide Rule by Halden & Co

English, c. 1900, in boxwood, entitled 'Scale of Power & Speed for Proposed Vessels on Measured Mile Trials, the reverse giving further calculations, length 38cm. Note: both sides give detailed information for calculations, each letter of each word separately stamped, indicating a very small production run.

Sold for £264

Result including buyers premium


 
English, c. 1900, in boxwood, entitled 'Scale of Power & Speed for Proposed Vessels on Measured Mile Trials, the reverse giving further calculations, length 38cm. Note: both sides give detailed information for calculations, each letter of each word separately stamped, indicating a very small production run.
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