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494616001
Astronomical ring; outer ring: meridian ring; engraved arc suspended from small ring; latitude scale 0-90 degrees; second ring: pivoted at equatorial points of first ring, equinoctial when opened fully, engraved on inside with annual scale of dates and on outside with positions of first points of corresponding zodiac signs; third internal ring pivoted north and south poles of meridian ring, fitted with internal sliding ring, carrying pair of sights; inner surface of sliding ring marked with zodiac signs and twenty-five stars.
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