1st Nov, 2018 12:00
Fine Photographica & Instruments of Science & Medicine
Imperial Russian Surveying Protractor & Scale Rule by Oskar Richter
hand engraved on heavy gauge brass, divided to half a degree, degree scale numbered in three ways; 0-90-0, 0-180, and 180-360, scale rule engraved with the ratio 1:8400 Russian ‘fathoms’ (7 Imperial British feet), scale rule divided to 1/100th inch by transversals, width 22.1cm
Sold for £120
Result including buyers premium
hand engraved on heavy gauge brass, divided to half a degree, degree scale numbered in three ways; 0-90-0, 0-180, and 180-360, scale rule engraved with the ratio 1:8400 Russian ‘fathoms’ (7 Imperial British feet), scale rule divided to 1/100th inch by transversals, width 22.1cm
Auction: Fine Photographica & Instruments of Science & Medicine, 1st Nov, 2018
