universal equinoctial ring, Augsburg: the equinoctial hour ring engraved on the inner rim of a Roman numeral hour scale; the meridian ring marked with a declination scale and latitudes for a selection of cities on the front and reverse; suspension ring; the bridge, featuring the zodiac scale on one side and the calendar scale on the other, with a slotted cursor sliding along the centre
Origin: Germany
Period: 18th century
Materials: Brass
Dimensions: H 12 x 11 x 1 cm