Other Archives - Page 13 of 20

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A rare example of a instrument by the swedish instrument maker established in Stockholm from 1775 to 1812. The instrument is signed with the initials “IGH”. This protractor is of early form, based on Italian shape. It is engraved from 40 to 180 degrees and from 0 to 140 degrees. A rare signature and a nicely shaped protractor. Size : 11,5×5,3 cm Read More...

27 Apr

Landmark Compass

By TESSERACT

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CARTOGRAPHIC POCKET COMPASS, Swiss, c. early 20th century, the 2-1/4″ (5.7 cm) diameter plated brass case nicely glazed, and fitted with printed paper under its own protective glass disk, with a raised counterbalanced blued needle. The paper shows the pivot centered on a map of Switzerland, with cities, surrounding countries, and directionals all labeled in French, and with the map scale specified “Echelle 1:8,000,000.” The center is in the region of the highest mountains of the Swiss Alps, and Read More...

27 Apr

Four-Vane Surveying Compass from Warsaw

By TESSERACT

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POLISH FOUR-VANE SURVEYING COMPASS, c. second half 19th century, finely signed on the silvered compass face “G. Gerlach w. Warszawie No. 84.” Measuring 16″ (41 cm) overall, this fine solidly made brass surveying compass has two folding vanes and two fixed vanes which mount from underneath. It is complete with the original carrying case and a large brass pin, but lacks the universal staff mount. Condition is very fine noting only a few spots to the original clear lacquer Read More...

15 Apr

Wax ear model, Barcelona, C. 1890, “Oido corte interno”

By Van Leest Antiques

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A wax model of the ear, wrapped in a cloth. All the parts of the ear are shown, with description on the side in spanish(connected with small ropes). This model is called “Oido corte interno” in spanish which means “internal cut ear”. The box is made of wood and there is a glass plate in front of the model to protect the wax. The object is estimated around the end of the 19th century and is fabricated in/around Barcelona. Read More...

15 Apr

Wax kidney model, Barcelona, C. 1890, “riñón humano”

By Van Leest Antiques

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A model of the human kidney, made of wax, wrapped in a cloth. All the parts of the kidney are shown, with description on the side in spanish(connected with small ropes). This model is called “riñón humano” in spanish which means “human kidney”. The box is made of wood and there is a glass plate in front of the model to protect the wax. The object is estimated around the end of the 19th century and is fabricated in/around Read More...

10 Apr

Theodolite signed Damerÿ A Bruxelles made around 1610.

By Galerie Delalande Paris

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Theodolite signed “L. Damerÿ A Bruxelles“. Dimensions : diameter 18,8 cm x height 24,9 cm. Provenance: Antiquités Scientifiques Marc-André & Marlyse Perret, Geneva. In the form of a Greek cross inscribed in a circle, with four fixed pinnules. On this face, three scales (from outside to inside): for degrees (360°), clockwise starting from the right, numbered every 10°; a shadow square, inscribed VMBRA VERSA twice, and a third scale to construct regular polygons: Polÿgons Interns, Polÿgons Externs, and the signature: L. Damerÿ Read More...

06 Apr

FOLDING “PALMO DI ARCHITTETTO” RULE

By TESSERACT

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FOLDING “PALMO DI ARCHITTETTO,” Italian, 18th century. Constructed as a sector, the brass rule opens to 8-13/16″ (22 cm). The circular hinge is engraved with a rosette on each side, and there is a central stabilizing strip. The front is labeled “Palmo di Archittetto,” and this “architect¹s foot” of 12 short inches is divided and labeled every inch, the terminal inches divided into tenths and quarters respectively. Each inch is approximately 18.6 mm long. Condition is very fine, with Read More...

25 Mar

ELEGANTLY CARVED PROPORTIONAL DIVIDERS

By TESSERACT

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ELEGANTLY CARVED PROPORTIONAL DIVIDERS, probably central European, c. 17th / 18th century. Measuring 15-1/2″ (39 cm) long, the double-ended dividers are masterfully carved of wood with four inset iron tips and a beautiful iron wing nut. Rectangular slots accommodate the sliding, clampable pivot giving variable ratio positions, calibrated with Roman numerals 2 through 10 and beyond (to 16 apparently). The pivot clamp is made of opposing wood blocks, beautifully carved with geometric designs on all sides. The arms are Read More...

15 Mar

EARLY CONTINENTAL PANTOGRAPH, c. early 18th century

By TESSERACT

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EARLY CONTINENTAL PANTOGRAPH, c. early 18th century. This diminutive drafting instrument is contained in its original finely shaped and fitted wood case bound in dark leather with gilt-stamped decoration to the lid, the interior lined with red chamois leather, the case 10-5/8″ (27 cm) long overall. The brass pantograph is substantially built, designed with opposed hinged “V” shapes which join in widely-adjustable integral positions (*, 3, 4, 5, 6, 8) on each of the four arms. The larger “V” Read More...

26 Feb

Torpedo gyroscope, Sweden, circa 1965.

By Hatchwell Antiques

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A torpedo gyroscope, Swedish, circa 1960 – 1965. Plate to base marked: OH S – T0 87 Production attributed to AB Motala Verkstad of Sweden. Height: 26 cm. width: 19 cm. Depth: 27 cm. The same model of gyroscope is photographed in the collection of the Marinmuseum, Karlskrona, Sweden. AB Motala Verkstad is one of the oldest engineering companies in Sweden. The company was founded in 1822. Read More...

24 Feb

Nice early 19th century italian brass compass Signed: “Cittelli f. in Milano “

By Eppursimuove

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Early 19th century italian brass compass, for use on the plane table surveying. Signed: “Cittelli f. in Milano “ Pasquale Cittelli was a skilled surveying instrument maker in Milan active in Milan in the first half of 19th century, he made wide range of surveying instruments but very few was preserved until today. He is mostly knew from Italian surveying instruments collectors. Diam: 14 cm Feel free to ask for further information and details. Thanks Read More...

23 Feb

2000 PAGES OF INSTRUMENTS — 50 TESSERACT CATALOGUES

By TESSERACT

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COMPLETE SET OF 50 LATEST TESSERACT CATALOGUES, American, 1998 – 2020. For sale are brand new copies of Catalogues #62 through #111, each containing 40 pages of early scientific instruments for sale, all fully illustrated, described, and priced. Included are all manner of unusual instruments of astronomy, microscopy, dialling, navigation, surveying, drafting, calculation, demonstration, experimentation, technology, surgery, diagnostics, dentistry, and ophthalmology. Read More...