City Of Westminster | Science Museum Group Collection

Pocket box sextant with leather carrying case (damaged), made by Elliott Brothers, 30 Strand, City of Westminster, London, England. 1855-1865. Consists of two circular lacquered brass plates with lid that acts as a handle when used. Fitted with Inlaid silver scale (-5° to 165°) with 30' divisions and a silver vernier (1' div.). The index arm is rotated by a milled knob on the upper plate with two filter shades (red & green) operated by lever. The index glass is fixed with adjustment for the horizon glass. Fitted with magnifier (single lens) on hinged 40 mm swivel arm and choice of a large and a small pinhole. Marked 'Walter I. Tatham' on lid (possibly owner).

Box type pocket sextant with case.

1855-1865

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Part of miner's surveying compass, British, 1845-1855

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Compass in fob-watch case, English,1784-1809.

Pair of round lens spectacles with wire arms

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Box type pocket sextant with case.

Box type pocket sextant.

Spyglass telescope with fishskin case.

Artificial black glass horizon.

Opera glass telescope with gilded brass tube and leather case

Regnault hygrometer and aspirator, 1893