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A 19th century boxwood travelling diptych sundial and compass, string gnomon, folding for the pocket, 8cm wide
A George III shagreen tapered rounded rectangular draughtsman's etui, hinged cover enclosing an arrangement of drawing implements, 17cm long, c.17...
A military marching compass,
A military marching compass, 6cm diam
A set of six mercury hydrometers, Twaddell's no.1 to 6, by James Woolley, Sons & Co, 25.5cm long, cased ...[more]
A William IV brass monocular compound microscope, by Andrew Pritchard, London, convex mirror,
A William IV brass monocular compound microscope, by Andrew Pritchard, London, convex mirror, adjustable candle sconce, tripod base, 51.5cm high, ...
An Admiralty pattern brass parallel rolling rule, by Camper & Nicholsons Marine Equipment Ltd,
An Admiralty pattern brass parallel rolling rule, by Camper & Nicholsons Marine Equipment Ltd, 46cm long, cased ...[more]
An American brass military clinometer, Quadrant, Gunners, M1 No 85103 Minneapolis Honeywell Reg Co (1942?), 20cm wide, leather case
An early 18th century French brass folding square or sector, by Haye, Paris, marked out and inscribed Les Parties Egalles, opening to 33cm long, c...
An early 20th century brass and mahogany circular vial spirit level, push-fitting cover, 15.
An early 20th century brass and mahogany circular vial spirit level, push-fitting cover, 15.5cm diam
An early 20th century oxidised brass theodolite, by Troughton & Simms, London, 10" main tube,
An early 20th century oxidised brass theodolite, by Troughton & Simms, London, 10" main tube, 180 degree elevation, compass to base with silvered ...
An early 20th century surveyor's brass rolling parallel rule, 46cm wide, mahogany case; another,
An early 20th century surveyor's brass rolling parallel rule, 46cm wide, mahogany case; another, similar (2)
An interesting collection of scientific, drawing and optical instruments, including an American Optical Co [USA] Macula Retinoscope; micrometer; c...
Cartography - Map Reading - a 19th century nickel-plated patent chartometer, by Morris, Birmingham,
Cartography - Map Reading - a 19th century nickel-plated patent chartometer, by Morris, Birmingham, 5cm register, tooled and gilt leather case, ad...
Early Telecommunications - an early 20th century clockwork telegraph or telephone instrument,
Early Telecommunications - an early 20th century clockwork telegraph or telephone instrument, the clockwork mechanism set off with a pull-chain an...
Science and Medicine - a 19th century brass pump, by Savigny & Co, St James's Street, 19.5cm long; 19th century lacquered brass microscope chassis...
Vintage Wireless - a British Thomson-Houston (BTH) Type C2 loud speaker horn, approx. 57.5cm high
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