1st Nov, 2018 12:00
Fine Photographica & Instruments of Science & Medicine
A Bohemian Equinoctial Ring Dial
sundial with one quadrant graduated 0-90°, chapter ring I-XII-I-XII marked for every half-hour, engraved to reverse with latitudes for five cities, the bridge with sliding pinhole gnomon on calendrical scale, 5.5cm diameter
sundial with one quadrant graduated 0-90°, chapter ring I-XII-I-XII marked for every half-hour, engraved to reverse with latitudes for five cities, the bridge with sliding pinhole gnomon on calendrical scale, 5.5cm diameter
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Auction: Fine Photographica & Instruments of Science & Medicine, 1st Nov, 2018
