拍品 64
64
An 18th-Century brass universal equinoctial ring dial, unsigned, the meridian ring with sliding suspension ring, engraved on one side with two quadrants, the pivoted equinoctial ring with twice I-XII hours, the bridge with sliding pin-hole sight against calendrical, zodiacal and N-S declination scales - 5in. (12.7cm.) diam.

細節
An 18th-Century brass universal equinoctial ring dial, unsigned, the meridian ring with sliding suspension ring, engraved on one side with two quadrants, the pivoted equinoctial ring with twice I-XII hours, the bridge with sliding pin-hole sight against calendrical, zodiacal and N-S declination scales - 5in. (12.7cm.) diam.