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17 Jul

Brass Polyscope

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small dents to the body  Read More...
16 Jul

Marconi-Newton constant speed windmill, dated 1916.

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A twin bladed aluminium Marconi-Newton type 182S constant speed windmill dated 1926.  MARCONI-NEWTON CONSTANT SPEED WINDMILL PAT. No 262558/1926 3500 R.P.M. 85/300 M.P.H TYPE 182S No 27582/23 Propeller length: 46 cm.  For a similar Marconi-Newton constant speed windmill see the online catalogue of the Marconi Collection at the Museum of History of Science, Oxford. Inventory Number: 54960  Mounted on a modern display stand allowing the propeller to rotate.  Read More...
15 Jul

Mechanical Hatching Rule

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Ebony and nickel mechanical hatching rule in good working condition Read More...
09 Jul

~FABULOUS MINER’S COMPASS-DAVIS, DERBY~

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Fabulous original condition, silvered dial engine divided into 32 hours with additional 8 cardinal points in 4 hour time divisions (each hour being 11.5 degrees). Signed J. Davis, Derby in flowing script. Original glass. Mahogany case with square hinges and both L-shaped hooks intact. Locking tab for the compass needle with domed brass ring. 13 x 13 x 2 cm. (6 x 6 x 1 inch). John Davis (VII) worked at 3 addresses in Derby during his long career (1828-1872).  Read More...
05 Jul

Batten’s sphygmometer in its original case

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Batten’s sphygmometer in its original case and in excellent mechanical/cosmetic condition.This small instrument (only 2.75″ in length!) is a rarity. It is not in the Naqvi and Blaufox book on on BP measurement but since acquiring it we’ve been able to find a catalog listing (see last image) and an article,published in 1892 , in which Batten introduced it to the British medical community–see link that follows. While it superficially resembles Cruise’s sphygmometer, it was introduced 16 years earlier. Read More...
05 Jul

Celestial Globe, Star Finder – H.Hughes & Son, London, ca. 1920

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Making position by observation of stars is done at twilight. With partly cloudy skies it can be difficult to find the right stars. This star globe helps with it. In the lid of the box there is a paper label with instructions for use.   This globe is in the original box from the early 20th century with recessed clasps. Box and globe are both signed H.Hughes & Son. Later globes are mostly made by Kelvin and Hughes and do not Read More...
05 Jul

Very rare and early 8-day Chronometer – Parkinson & Frodsham, ca. 1820

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Marine chronometer of Parkinson & Frodsham with rare display in original mahogany box with key and brass mountings. Bone plate 355 numbered. Gimbal suspension, brass case, spring detent chronometer with helical hairspring. Signed and numbered 355. Original dial with rare rotating power reserve indicator for 8 days of power. Blued steel hands, large seconds indicator. Chronometers by the important London manufacturer Parkinson & Frodsham are very rare and sought-after collectors’items. Date: ca. 1820HWL box: 17x17x17 cmD chronometer: 10 cmSigned: Parkinson Read More...
28 Jun

~RARE AND FINE COMBINATION BAROMETER AND COMPASS-SIDDALL~

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A rare combination pocket barometer and compass by J.D. Siddall, the Cross (Bridge Street), Chester c.1880. Measuring 2 inches (5cm.) in diameter, this gilt brass compendium has seen little use. The fully compensating barometer with silvered dial measures barometric pressure from 23-31 inches and altitude from 0-8000 feet (ballooning?). The needle has been set for 300 feet and responds well when bag tested. Suspension loop and bevelled glass. On the reverse is a 2 inch compass with locking tab/bar and jewelled Read More...
23 Jun

Four C1880 Monaural Stethoscopes

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We are offering four C1880 monaural stethoscopes, all of which are likely British or Irish in origin. They are identified in the first listing image.Happy to provide additional images or documentation 1) The Walsh is made of fir with a Vulcanite or Celluloid earpiece Height=7″.  No condition issues: $295.00. 2 The Burrows is made of cedar with a bone earpiece.  Height=7″. No condition issues: $695.00, 3) The Stokes is ebonized wood throughout. Height=6″ No condition issues: $295.00. 4) The Bliss is ebonized wood Read More...
22 Jun

Victorian apothecary or medicine chest

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Victorian apothecary or medicine chest with lots of bottles and acesoires,see the detail pictures including the original fitting key.Only if the front doors are opened can you open the secret compartment at the back of the locker to access the important and dangerous medicines.Dimensions 30 X 20 X 26 cm will be very well packaged and sent by registered post. Read More...
21 Jun

POCKET or BOX SEXTANT

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Leather case in good condition. dark filter on the telescope  Read More...
21 Jun

BOOKS ON OLD CAMERAS.

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SHIPPING BY FEDEX, DPD, DHL, ETC. FULLY TRACKED.  Contact Email:  [email protected] Read More...
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