18th Oct, 2019 12:00
Fine Photographica & Instruments of Science & Medicine
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 plus 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.
Auction: Fine Photographica & Instruments of Science & Medicine, 18th Oct, 2019
