~FINE GEORGIAN CIRCUMFERENTOR-TROUGHTON~

~FINE GEORGIAN CIRCUMFERENTOR-TROUGHTON~

$2995 USD (2300 GBP)(OBO) postage included

A fine Georgian era circumferentor by Edward Troughton c.1820

Dimensions

20 x 12 x 10 cm.

Circa

1820

Maker

Troughton

Country of manufacture

UK and Ireland

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

Description

20 cm. diameter with 12 cm. silvered compass and 10 cm. sighting vanes, this surveying instrument is signed “Troughton, London” in flowing script. Compass dial divided into 360 degrees on the outer ring and further divided into four 90 degree quadrants. Unusual features include a RED compass needle (still points North), round knurled compass lock knob and a wonderful butterfly nut below for the pole staff. Outer ring fully divided in 1/2 degree increments for the full 360 degrees with vernier diamond (not further subdivided).  Vanes can be used in any variation through 90 degrees. Vane sighting hairs missing but will include a replacement horse hair for the purist to re-string. A beautiful, fully functional and asthetically pleasing instrument by the founder of the famous Troughton and Simms Company. No compass lid or box.

Edward Troughton (1808-24) had a shop at The Orrery, 136 Fleet Street in London and was a top maker.

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CA ScientificaOpticae

Scientifica Opticae

Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 40 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). As of Nov. 1/24 my email has changed to either [email protected] or [email protected].

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