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Antique Troughton & Simms Equinoctial Dial


Offered for sale is an antique lacquered brass English equinoctial dial, signed Troughton & Simms, London, with a glazed silvered compass having a locking needle with a brass cap, hour ring with engraved Roman chapters and folding gnomon, latitude arc 2 1/2" diameter, in a plush lined leather case.

Troughton & Simms was a British instrument-making firm, formed when Edward Troughton in his old age took on William Simms as a partner in 1826.

It became a limited company in 1915 and in 1922 it merged with T. Cooke & Sons to form Cooke, Troughton & Simms.

The firm produced hundreds of astronomical instruments such as mural circles, transit circles, universal equinoctial compass dials, sextants, and other astronomical instruments for observatories around the world.

Previously, Troughton had been a sole proprietor, and before that he was in partnership with his brother John. John died and Edward took on Simms in 1826. Edward Troughton died in 1835.

The instrument measures 5 1/4" in diameter. The fitted box measures 6 1/4" square in diameter.

Provenance: Christies, May, 1997: From a private estate.

Ref: Hill. H.OL. & Paget E.W. Tomlinson: 'Instruments of Navigation, London,1958

Ref: Ward.F.A. B. 1981 'A Cat. of European Scientific Instruments in the dept. of Medieval & Later Antiquities of the British Museum, London.


Please look at the picture and read the description, which form a part of the condition description. What you see and what you read is what you are buying

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This product would make a wonderful addition to any scientific instrument or sundial collection when displayed in a prominent place, being a grand collectible item that would adorn any serious collector's prized scientific instrument and sundial accumulations, while showing a discriminating dedication for fine sundials and other scientific instrument items as well as a devotion to acquiring fine collectibles.

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  • Model: Troughton & Simms Equi.Dial

This product was added to our catalog on Saturday 06 September, 2014.

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