21st Sep, 2017 12:00
Fine Instruments of Science & Medicine
An English Compass Sundial Calendar Compendium
in the form of a complex perpetual calendar box, with two volvelles and revolving world times indicator, interior reveals a compass sundial gnomon set at approx 51.5 degrees, calendar covers years 1792 to 1832, to base an astronomical table and volvelle giving moon's age, phases and southing, case diameter 78mm
in the form of a complex perpetual calendar box, with two volvelles and revolving world times indicator, interior reveals a compass sundial gnomon set at approx 51.5 degrees, calendar covers years 1792 to 1832, to base an astronomical table and volvelle giving moon's age, phases and southing, case diameter 78mm
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Auction: Fine Instruments of Science & Medicine, 21st Sep, 2017
