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Troughton and Simms Double Frame Polished Brass Presentation Sextant

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Troughton & Simms Double Frame Brass Qintant - Sextant

POLISHED TROUGHTON & SIMMS
Double Frame Quintant - Sextant
Named to Robert T. Way

 

Troughton & Simmms double frame pilar
                                    sextant marked Robert T Way image

DESIRABLE PRESENTATION GRADE

TROUGHTON & SIMMS were the best of the English instrument makers. This Presentation Grade instrument dates from their partnership and belongs in a collection of fine nautical antiques or as an important gift

 
Copyright 2016 by Land And Sea Collection™ All Rights Reserved

PRESENTED is a rare double frame quintant or sextant that was made by Troughton & Simms - London, for presentation to Robert. T. Way. It carries serial number 2264 on its center limb which is 700 less than a similar instrument which we sold in 2015. The instrument was received by us in its original polished brass and was repolished and lacquered to its original status. The arc is brass with a silver insert for the gradations. Edward Troughton was the inventor of this design and patented it in 1788 with other makers copying his design.

The instrument's arc is graduated into 145 degrees which classifies it as a Quintant. Brass became the accepted material of choice for sighting instruments in the later 19th Century because of its strength and durability. The double frame design was expensive to make and never gained the popularity of the more common single, cast-frame instruments. Consequently, there are few that come to market.

Double frame instruments look spectacular so they make an ideal gift and a wonderful reminder of navigation in the the 19th Century. 
Back of Troughton & Simms Double Robert T Way Sextant image

As pictured above, the back of the sextant shows the two straight bar pillar frames that are held together with twenty one pillars, and their screw fittings. There is a turned Rosewood handle which is cracked down its length, but still holds strongly. The tangent screw and clamping screw are positioned on the back of the index arm. The device has four square index shades, and three round horizon shades. The telescopes are attached to a perpendicular rising-piece which is adjusted in and out by a milled knob. There is also a focusing magnifier traveling over the vernier.  The brass limb is inlaid with a sterling scale from -5° to 145° divided each 5 degrees. The sterling vernier measures from right to left from 0 to 10° in arc seconds.

lower limb of Way Troughton double frame
                                    sextant image

The picture above shows the adjustable rising piece with the knurled knob at the bottom which allowed for the telescope to be moved toward or away from the frame thereby increasing the visibility of the horizon. 

This is a an extremely rare and very fine example of a double frame, pillar,  presentation grade instrument made by Troughton & Simms, one of England's most prestigious instrument makers!

 
Close-up of vernier showing the maker's and Way's name image
Robert T. Way and Troughton & Simms- London Maker's Mark to left

INSTRUMENT & CASE CONDITION: One telescope is a pure sighting tube for terrestrial objects. The longest scope with optics has cross hairs that displays the object upside down which was ideal for astronomical use. The short scope with optics, does not focus properly, but displays the image right side up. There is one other scope that is unpolished with optics that does not focus. Both mirrors, considering their age, are in very good condition. The swing arm magnifier is complete and in good working order. Both sets of shades, i.e., filters are in perfect condition. The endless tangent screw turns easily. Both the small screw driver and the adjusting wrench for the mirrors is missing.

The fan shaped case is in excellent condition and the varnish has pleasantly mellowed with age. There are four pockets on the right side and only two end lens caps are present. There also is a large wood slot on the left which is empty. Likely an English mariner, there is no record of Robert T. Way on the internet.

 
Close-up showing the
                                    horizon mirror image
The split image elliptical horizon mirror in remarkably good condition

 

Close-up of index mirror image
The index mirror is also in very good condition 

 

 HISTORIC BACKGROUND

Edward Troughton, FRS (October 1753 – 12 June 1835) was a British instrument maker who was notable for making telescopes and other astronomical instruments. Troughton was born at Corney, Cumberland. In 1779, after serving an apprenticeship with his elder brother John, he became his partner and soon established himself as the top maker of navigational, surveying and astronomical instruments in Brittan.

In 1795 he delivered the Troughton Equatorial Telescope to the Armagh Observatory, a 2 inch aperture refractor telescope mounted equatorially, and its first major instrument since its founding in 1790 (It survived into the 21st century also).  He created the Groombridge Transit Circle in 1806, which Stephen Groombridge used to compile his star cataloger.[3] He did not merely build instruments, but designed and invented new ones such as his double frame instrument of 1788.

Troughton was awarded the Copley Medal of the Royal Society in 1809. He was elected a Fellow of the Royal Society in March 1810. In 1826, after John's death and in failing health himself, he took on William Simms as a partner and the firm became known as Troughton & Simms. Troughton was color blind. On his death in 1835, he was buried in Kensal Green Cemetery.

TROUGHTON & SIMMS, THE SUCCESSOR: 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, 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. 

Ref. This maker is is listed in Sextants at Greenwich", "Sextants at Greenwich" by W.E.J. Mozer Bruyns, which catalogs the collection of the British National Maritime Museum at Greenwich, England.

 
 
Way Double frame sextant housed
                                    in open case image
The Robert T. Way, Troughton & Simms Quintant housed in its Fan shaped case

 

 

The beautiful Robert Way fan shaped case image
              The Robert Way fan shaped Troughton & Simms case has a named plaque on top
 
 

CERTIFICATE: There is no certificate which is customary with very old instruments.

DIMENSIONS:

Arc -5° to + 145°:
Length of index arm     10 1/8"                                                    
Radius of arc                 9 1/4"                                                 
Width of frame at arc    11 1/4"
Index mirror                  48 x 38 mm
Horizon mirror              38 x 30 mm ellipse
4 index shades

3 horizon shades
Sextant Weight             2 Lbs 13 3/4 oz   
               

CASE: Fan Shaped        13 3/4" x 10 3/4" x  5"            Weight  4 lbs. 4 oz.     Total weight 6 lbs. 1 3/4 oz.

Arrangement of telescopes in case
                                The arrangement of the four sighting tubes is complex
 
 

OUR UNCONDITIONAL NO NONSENSE GUARANTEE: If not completely satisfied with your purchase it may be returned, if without damage, within five days of receipt in its original packaging. Return items must be insured for their full value. Only a prior email authorization by us for the return is required. Shipping charges within the continental United States are included in this offer if the error is due to our fault.  

International buyers welcome, but inquire first. We have satisfied customers in Argentina, Australia, Austria, Belgium, Bermuda, British Virgin Islands, Canada, Chile, Republic of China, Czech Republic, Democratic Republic of Congo, Denmark, Estonia, England, France, Germany, Greece, Holland, Hong Kong, Hungary, Iceland, Indonesia, Ireland, Israel, Italy, Japan, Kuwait, Latvia, Luxembourg, Malaysia, Martinique, Mexico, New Hebrides (Vanuatu), New Zealand, Nigeria, Norway, Nova Scotia, Panama, Philippines, Poland, Portugal, Puerto Rico, Romania, Russia, Saudi Arabia, Scotland, Singapore, South Africa, Spain, St. Maarten, Sweden, Switzerland, Thailand, Turkey, United Arab Emirates, USVI, Vanuatu (New Hebrides) and the Eastern Caribbean. 

STANDARD FORMS OF PAYMENT are Bank wire transfer, cashier's check, money order, or personal check in which case the item will be held until cleared. Our prices are quoted net to us so that the use of credit cards or PayPal incur extra charges. Terms on overseas sales are different. 

Copyright 2016 by Land And Sea Collection™ All Rights Reserved