A Dieppe ivory diptych dial
17th century
unsigned and undated, black colouring throughout, corners of all leaves with poppy ornamentation; leaf 1a equinoctial dial 1-12 twice divided to the half-hour, polar dial 8-12-4 the hour lines parallel; leaf 1b scale to elevate dial [5°]-80°, lunar volvelle; leaf 2a horizontal dial 5-12-7, magnetic azimuth dial VII-XII-V, degree scale for compass (replacement glass) paper gazetteer for 24 European towns; leaf 2b modern replacement perpetual calendar (crack to ivory).
3in. (7.3 x 6.1 x 1.3cm.)
A Dieppe ivory diptych dial
17th century
unsigned and undated, black colouring throughout, corners of all leaves with poppy ornamentation; leaf 1a equinoctial dial 1-12 twice divided to the half-hour, polar dial 8-12-4 the hour lines parallel; leaf 1b scale to elevate dial [5°]-80°, lunar volvelle; leaf 2a horizontal dial 5-12-7, magnetic azimuth dial VII-XII-V, degree scale for compass (replacement glass) paper gazetteer for 24 European towns; leaf 2b modern replacement perpetual calendar (crack to ivory).
3in. (7.3 x 6.1 x 1.3cm.)
.jpg?maxwidth=3840)