Unsigned AN ENGLISH SILVER AND BRASS ANALEMMATIC DIAL LATE 18TH CENTURY AND A GERMAN GILT BRASS EQUINOCTIAL RING DIAL CIRCA 1700 • rectangular silver plate engraved at one end with hour scale divided IIII-XII-VIII, hinged brass gnomon adjusted for latitude and with engraved latitude scale. The opposite end of the plate bears an azimuth dial with an elliptical hour scale, vertical gnomon adjustable for solar declination against calendar scale, supported by brass leveling screws, unsigned • together with a gilt-brass equinoctial ring dial, circa 1700 ring dial, made for use in Northern latitudes (2 pieces) unsigned, German length 7 1/4 in (18.5 cm)
Unsigned AN ENGLISH SILVER AND BRASS ANALEMMATIC DIAL LATE 18TH CENTURY AND A GERMAN GILT BRASS EQUINOCTIAL RING DIAL CIRCA 1700 • rectangular silver plate engraved at one end with hour scale divided IIII-XII-VIII, hinged brass gnomon adjusted for latitude and with engraved latitude scale. The opposite end of the plate bears an azimuth dial with an elliptical hour scale, vertical gnomon adjustable for solar declination against calendar scale, supported by brass leveling screws, unsigned • together with a gilt-brass equinoctial ring dial, circa 1700 ring dial, made for use in Northern latitudes (2 pieces) unsigned, German length 7 1/4 in (18.5 cm)
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
