A brass universal equinoctial ring dial, English, 18th century,
Unsigned, complete with suspension ring, meridian ring engraved on the obverse with 90-0-90 degree latitude scale, the reverse with scale for determining solar altitude and zenith distance, the equinoctial ring engraved on the obverse with I-XII, I-XII hour scale, bridge with sliding cursor and pin-hole moving over date scale on one side and zodiac scale on the other, 5 1/4in (13.5cm) diameter
Sold for
£1,125
inc. premium
Category: Collectibles / Scientific Instruments
Auction terms and conditions
Contacts
Jon Baddeley
Bonhams
Work
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London,
SW7 1HH
United Kingdom
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0207 393 3872
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Specialist
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Scientific Instruments