The Boreal Arrow
Code BA22021301: Georgian Wooden English Sundial and Compass by Jones Holborn, London, c. 1820
|This an extremely rare sundial compass dating from around 1820 by Jones Holborn of London. It is housed in a mahogany case still in nice and excellent condition. No damage. The hook is present and work fine to secure the lid when closed. The gnomon is yellow brass. It must be unfolded to read the solar time on the circular ring above the glass crystal that covers the compass. The circular ring is engraved with makers name: Jones Holborn, London. Inside the lid there is an inscription, which seems to be: Variation London, NNW: -20. The glass crystal and gnomon are in excellent condition without any damage. The compass has a flat needle with a crown shaped brass cap. The dial has a typically nautical design with a nice compass rose. It points North with precision and there is a transit lock that comes into operation when the lid is closed. The size of this rare and quality example is approximately 93mm x 92 mm x 23 mm.