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30 Dec

J.SEARCH BRASS PROTRACTOR, 18th CENTURY , GOOD COND. DIAMETER 4 IN. ( 110mm )

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ALL IN GOOD CONDITION Read More...
29 Dec

W & T GILBERT BRASS PROTRACTOR, (1781-1844 ), 4 in. (152mm ) DIAMETER , GOOD COND.

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THOMAS GILBERT AND HIS BROTHER WILLIAM GILBERT , INSTRUMENT MAKERS  THIS PROTRACTOR IS IN GOOD CONDITION   Read More...
29 Dec

SMALL BRASS PROTRACTOR by JOHN FREDERICK NEWMAN (1782-1860 ) DIAM; 3.25 IN. ( 84 mm ), GOOD COND.

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ALL IN GOOD CONDITION , SMALL SIZE Read More...
22 Dec

Three draw pocket telescope with pancratic eyepiece – Braham.

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This three draw brass telescope has a leather covered barrel and measures 5.5 inches long pulling out to 15″. It is signed ‘Braham, Bristol’. John Braham worked at various addresses in Bristol from 1828 – 1838. This 3 draw has a ‘hidden’ pancratic tube / eye-piece. If the user partially unscrews the eye-piece a concealed pancratic eye-piece can be accessed (fully retractable). This tube is engraved, ‘Pancratic Eye Tube’ and has various magnification engravings from 15 – 35 x. Very clean and Read More...
22 Dec

Three draw telescope by Thomas Harris & Son.

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A good 3 draw telescope measuring 29″ fully drawn and 9.75″ closed with a main achromatic lens of 1.5″. It is signed on the flat plate of the eye-piece, ‘Thos Harris & Son, London’. No cracks / dents / chips, the telescope gives a very clear view. Thomas Harris & Son, William, had a long career working from 1802 – 1901. Read More...
22 Dec

Seven draw telescope – Myers, London.

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Signed on the flat of the eye-piece, ‘Myers, London’, the telescope measures 22″ and 4.75″ closed. It has a lens cap and a dust slider to the eye-piece. Small dent to the barrel. Read More...
22 Dec

Two draw telescope in case.

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Unsigned, measuring 7.75″ closed and 19″ fully open with a main lens of just over 1″. The lens cap threads onto the main lens cell. It gives good clear views, no dents. Some nicks to the red enamel. Contained in cardboard case. Read More...
21 Dec

three draw telescope with engraved ‘scale of minutes’.

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A nickel silver three draw telescope with a dark, mahogany barrel, unsigned, but the 2nd and 3rd draw tubes engraved with a scales of small increments and ‘Scale of minutes’. It was the Scottish scientist Sir David Brewster who invented the telescope for measuring Angles and Minutes and had a joint patent with instrument maker William Harris to produce / sell such a telescopes in May 1811. Brewster’s original design of this type of telescope was engraved, ‘Scale of minutes divided Read More...
20 Dec

Museum Miniature surveying sextant Signed Nairne and Blunt C.1785

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Rare Miniature surveying sextant constructed in lacquered brass Signed Nairne and Blunt across the T-bar . Diagonal gilet scale divided to 130 degres, vernier with fine screw adjustment , two mirrors, six shades, threaded mounting tube, with threaded wooden handle behind. Lens of mounting tube missing. Good condition. Nairne and Blunt Edward & Thomas  shop in 20 Cornhill Fronting the Royal Exchange  London in 1783.   Read More...
20 Dec

Universal Microscope by R & J Beck of London.

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Universal Microscope by R & J Beck of London, 1867. Serial number: 4757. Circular base marked: UNIVERSAL MICROSCOPE – R & J BECK LONDON In original fitted case with brass handle: H: 33.5 cm.   Literature:  Richard Beck’s The Achromatic Microscope, 1865.    For a similar Universal Microscope by Smith, Beck & Beck see the collections of: The Science Museum, London. (Sir Henry Wellcome’s Museum Collection) Object number: A18435.  Billings Microscope Collection at Walter Reed Army Hospital, Washington DC. The Golub Collection, University of California, Berkeley. Read More...
20 Dec

~VERY FINE SEXTANT by GRAY and KEEN~

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A very fine (as new-unused) anodized and bright brass sextant signed “Gray and Keen, Strand Canning Dock, Liverpool” with a certificate of accuracy dated May 1, 1891. Having an index arm of 9 inches with an arc circle of 10 inches, this instrument is in original, untouched condition. Although the silvered scale (runs out to 150 degrees) is oxidized-silver sulphide black, this instrument has been perfectly preserved for over 130 years. No faults, rare address. A perfect specimen. The case Read More...
18 Dec

~IMPORTANT, LARGE DAVIS QUADRANT in MAHOGANY~

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An important Hadley-type/Davis quadrant in mahogany wood with bone scale and name plate c.1791. Made during the first year of the partnership of Gilbert, Wright & Hooke at the Navigation Warehouse, 148 Leadenhall St., London,  this instrument has many nuances not seen before or after. Having a 17 inch index arm radius and a 15 inch arc circle, it is a rare survivor in near perfect condition. The mahogany frame has a rich colour and the brass has taken on Read More...
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