A Charles Bloud-type ivory magnetic azimuth dial, Dieppe, circa 1660, the upper outer face with pin gnomon dial with hour scale divided to 30 minutes, inner upper face with white metal lunar volvelle within hour scales, lower inner face with elliptical hour scale, printed compass rose with table of latitudes, the base with brass volvelle, date scale and perpetual calendar, 2½in (6.5cm) long
A Charles Bloud-type ivory magnetic azimuth dial, Dieppe, circa 1660, the upper outer face with pin gnomon dial with hour scale divided to 30 minutes, inner upper face with white metal lunar volvelle within hour scales, lower inner face with elliptical hour scale, printed compass rose with table of latitudes, the base with brass volvelle, date scale and perpetual calendar, 2½in (6.5cm) long
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
