S9683-001

Dieppe magnetic azimuth dial, leaves Ib and IIa Long Caption: Dieppe magnetic azimuth dial for latitudes 0°-80° North. Standard Dieppe magnetic azimuth dial (see related terms) except for the following details: the dial is divided into four leaves that fold flat when not in use. On leaf Ia is an hour scale. Leaf Ib carries a lunar volvelle. Leaf IIa contains the horizontal dial and the magnetic azimuth dial. An hour scale for the horizontal dial surrounds the compass well. The cardinal points are named in Latin on the compass and there is also a gazetteer for 18 French towns. The string gnomon that would have been used with this dial is missing. On leaf IIb, the volvelle is brass and there is a brass clasp over the slot for the pin gnomon. The dial is signed 'Jacques Senecal ADieppe fecit'. Credit line: © National Maritime Museum, Greenwich, London, Georges Bernard Collection Object: AST0508 Artist: Jacques Senecal Date: circa 1660 Medium: silver; ivory; brass; pewter-brass alloy; glass; card Size: 12 mm x 64 mm x 70 mm Click here to buy a bespoke print of this image.