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A brass spectroscope and Whimshurst machine, late 19th and early 20th century,the spectroscope by John Browning with prism mounted above circular...
An Edward Troughton small size brass sextant, English, circa 1820,signed Troughton London, with brass -2-0-126 degree brass scale, index arm wit...
A boxwood nocturnal, English, early 18th century,with brass mounted Polaris sight, pivoted index arm with projections for Great and Little Bear ...
A Troughton pillar-frame sextant, English, circa 1800,signed Troughton London, with -5-0-145 scale and vernier with magnifier, two sets of colo...
A T.B.Winter brass circular protractor, English, early 19th century,signed T B Winter Newcastle on Tyne, in fitted mahogany case, together wit...
A 1/2-inch refracting telescope in case, Italian, 18th century,with turned horn mounts, eye-piece and objective caps, three vellum draws and oute...
A Thomas Street brass transit Theodolite, English, circa 1880,signed T. Street Commerl Rd Lambeth London, with sighting telescope, horizontal a...
A Cooke Troughton and Simms brass transit theodolite. English, mid 20th century,signed Cooke, Troughton & Simms Ltd, at York, England, with sig...
A Baker brass transit theodolite, English, mid 19th century,signed Baker 211 Holborn, the sighting telescope mounted by two brackets, half circle ...
A Gurley brass theodolite, American, third quarter of the 19th century,signed W & E Gurley, Troy, the sighting telescope mounted with bubble level...
A George Adams brass theodolite, English,signed G. Adams London, the telescope supported by two brackets above racked half circle of degrees with ...
A Troughton & Simms brass transit theodolite, English, dated 1914,signed Troughton & Simms, London No.201, with sighting telescope, horizontal and...
A brass surveying level, French, late 19th century,the telescope with lens cap, supported by two brackets above circular platform and three levell...
A George Adams brass Theodolite, English, late 18th century,signed G. Adams London, the reversible telescopic sight supported by two brackets a...
A brass universal equinoctial ring dial, English, circa 1700,of standard form with suspension loop, 3 1/2in (9cm) diameter together with two pris...
AN ELIAS ALLEN BRASS DOUBLE SUNDIAL, English, 1635-1645,signed Elias Allen fecit, the octagonal dial with gnomon and plate engraved with hour and ...
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76 item(s)/page