Product images of Dieppe magnetic azimuth dial, leaves Ib and IIa
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Dieppe magnetic azimuth dial, leaves Ib and IIa
Dieppe magnetic azimuth dial for 50 north (0-80 North for equinoctial dial). Standard Dieppe magnetic azimuth dial (see related terms) except for the following details: the dial is split into four leaves. Leaf Ia carries an equinoctial dial and a polar dial; the pin gnomon for use with both these dials is missing. Leaf Ib consists of a lunar volvelle made of a pewter-brass alloy. Leaf IIa has a horizontal dial as well as the magnetic azimuth dial. The hour scale for the horizontal dial surrounds the compass well, and attached between the two leaves is a red string gnomon for latitude 48. The printed compass card has a rose showing 16 points and carries a radial table of latitudes for various places in Europe, North and South America, the Philippines, New Guinea and India. Leaf IIb has a date scale and a perpetual calendar on a pewter-brass volvelle. The dial is signed 'Ephraim Senecal ADieppe Fecit'.
- Image reference: F2092-2
- National Maritime Museum, Greenwich, London, Georges Bernard Collection