98th Auction
2018/11/10
Lot 177
Jaques Senecal à Dieppe fecit, 64 x 70 x 16 mm, circa 1660
A rare ivory diptych azimuth dial usable as a sun dial or a moon dial
Case: ivory, brass, gilt. Signed on the backplate.
The sundial’s upper tablet folds up by 90° and has in its centre an engraved equinoctial dial with the indication of the
temporal hours (2x12 hours), divided to 30 minutes. Polar dial in the centre. Inside lunar volvelle consisting of a fixed disc and two rotable discs with shaped pointers.The main body of the instrument has a horizontal, engraved semicircle dial with Roman numbers 6-12 and 12-5, which is movable through a slide. Printed compass card with outer radial latitudes and table with 18 French cities and their latitudes. Rectangular, turnable tablet fixed on the base with date scale and perpetual calendar with engraved months and their length.
An identical sundial is illustrated and described in detail in "Sundials at Greenwich" by Hester Higton, New York 2002, p. 227.
A rare ivory diptych azimuth dial usable as a sun dial or a moon dial
Case: ivory, brass, gilt. Signed on the backplate.
The sundial’s upper tablet folds up by 90° and has in its centre an engraved equinoctial dial with the indication of the
temporal hours (2x12 hours), divided to 30 minutes. Polar dial in the centre. Inside lunar volvelle consisting of a fixed disc and two rotable discs with shaped pointers.The main body of the instrument has a horizontal, engraved semicircle dial with Roman numbers 6-12 and 12-5, which is movable through a slide. Printed compass card with outer radial latitudes and table with 18 French cities and their latitudes. Rectangular, turnable tablet fixed on the base with date scale and perpetual calendar with engraved months and their length.
An identical sundial is illustrated and described in detail in "Sundials at Greenwich" by Hester Higton, New York 2002, p. 227.
estimated
2.800—5.000 €
Price realized
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