~UNUSUAL FOLDING TROUGH COMPASS by BRYSON of EDINBURGH~(ON HOLD)

~UNUSUAL FOLDING TROUGH COMPASS by BRYSON of EDINBURGH~(ON HOLD)

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An unusual, signed trough compass on a folding plate with cardinal points c.1880.

Dimensions

4 x 1/2 inch

Circa

1880

Country of manufacture

UK and Ireland

Categories: Calculating, Surveying Instruments & Mining, Engineering antiques, Office Antiques, Tools

Description

A fine and unusual trough compass by Bryson of Edinburgh c. 1880. Beautifully engraved with cardinal points, the compass measures deflection + or – 5 degrees. Probably intended for plane table surveying but with an unusual capacity to fold in half for the pocket. Hinged on both sides with a trapezoidal base, it is quite elegant. The compass unlocks by a sliding bar internally and by a pin externally. Four inch diameter in bright brass and original lacquer. Fine.

Robert Bryson (optician) was working at various addresses in Edinburgh from 1865-1895.

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CA ScientificaOpticae

Scientifica Opticae

Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).

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