French equatorial pocket sundial. C 1830

French equatorial pocket sundial. C 1830

Stock Number: C410121-181



Measurements: Diameter 6 cm, thickness 1.6 cm, length including suspension eye ,5 cm.


C 1830

Country of manufacture


Categories: Portable Sundials, Timekeeping


French equatorial pocket sundial. C 1830.

Gilt and silvered brass, with a glass bezel and three feet at the bottom. Original case. On the plate under the glass lunette are the latitudes of the cities of Vienne, Brussels, Sebastopol and Madrid. The compass is built in at the bottom with the cardinal points N, E, S, O, and 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330 and 360 degrees. The magnetic variation is 23 degrees West. The compass needle can be locked for transport. On the top of the plate is a pointer with scale, which indicates the angle of the hour ring to the horizontal. After opening the glass lid, the hour ring can be set to the correct latitude by turning a knob at the suspension eye. The indicated angle must then be 90 minus the latitude. For Amsterdam(52) this is 90-52=38 degrees. The top of the hour ring indicates the hours in roman numerals. On the inside, at the VI hour mark, a folding rod with the gnomon is attached.

Measurements: Diameter 6 cm, thickness 1.6 cm, length including suspension eye ,5 cm.

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NL Van Leest Antiques

Van Leest Antiques

Van Leest Antiques, based in Utrecht in the Netherlands, specialises in antique scientific and medical instruments. Their collection covers mainly scientific and medical antique instruments: barometers, globes and planataria, nautical instruments, anatomical models, and pharmacy items. Toon Van Leest travels regularly in Europe and visits trade fairs, auctions, and antique dealers to collect stock and to find pieces to fulfil his clients' unusual requests.

As well as being an avid antique collector and dealer, Toon Van Leest is also a dentist. He believes that antiques are a stable investment, not reliant on trends or fashion, and have truly lasting value. Above all, he says, antiques are timeless and never lose their beauty.