A Waywiser by Cary London C 1800. Probably made by William Cary.
The 80 cm. diameter six spoke wheel with iron tyre, brass dial signed Cary London, inscribed and divided for measurements in yards, poles, miles and furlongs. The mahogany fork body with shaped top and bar handles are connected to a clock-like movement, which in turn is driven by an iron shaft running up the inside of one of the wheel supports. Total length of 130 cm high. In good condition.
This is an surveying instrument for measuring distance travelled over the ground, including its undulations. As it is moved along, the wheel drives a mechanism in the dial, which clocks the distance moved.
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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.