German silver travel and pocket sundial with perpetual calendar. Dated 1701.
Inscription on the sundial: Anno 1701, Ad elevat : poli 55 gr: 42 min.
This latitude corresponds to Copenhagen. On the back a calendrium perpetuum (perpetual calendar) with the weekdays in German and along the edge the number of days for each month. To determine the time, the sundial is held by the eye, with the pin gnomon extended. The arm to which this gnomon is attached is then placed on the left date scale and the correct date is given in months: (j,f,m,a,m,j,a,s,o,n,d). The pocket sundial is then turned so that the shadow of the pin gnomon falls on the right hour scale, where the hour can be read. This type of pocket sundial was produced in small numbers very early.
Diameter: 58 mm.
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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.