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Antique Lens by Ross, London – Zeiss Convertible Antistigmat. with Iris & Case

Offered for sale is a very high quality antique brass lens assembly marked as under:   Ross, London Zeiss Convertible Antistigmat. 8 inchWith adjustment Zeiss patent end lenses 9 inch No. 2938 & 14 inch No. 2883   The function of the lens is not known with certainty but it’s likely to be from an antique Victorian-era plate-type camera, so it’s untested but hopefully will be of interest to collectors.  The iris moves OK, as does the adjustment collar. The item will be well wrapped for Read More...

Brass and steel reduction compass with two movable arms made in Germany circa 1620

Brass and steel reduction compass with two movable arms connected by a sliding hinge with a trefoil screw. Each arm has two steel points at the ends, one longer than the other, and is engraved with different scales: one arm has two scales marked “Proportiones homologorum / Planorum angendo Minuendo / Corporum angendo Minuendo” (one graduated from 1 to 100 and the other from 1 to 125). The other arm also has two scales marked “Partes data rationelineae / Read More...

Exceptional architect’s set signed ST dated 1697 in original embossed leather case

Exceptional architect’s set in embossed leather case, complete with its three brass instruments, all signed “ST” (signature not identified to date). The leather case, with a sliding opening, contains: three brass and steel instruments: a folding square acting as a scale-ruler with arms of different lengths and fretworked ends, a folding king’s foot and a pair of dividers with a “ball head”. This set is the only known complete architect’s set bearing the signature “ST”. We can confirm that this kit is Read More...

Perpetual calendar in mother-of-pearl and gilded brass made in Germany at the early 19th century

Perpetual calendar in mother-of-pearl and gilded brass with three discs. The upper disc in mother-of-pearl, called ‘CALENDARIUM PERPETUUM’ (perpetual calendar), features a scale of the days of the week with their corresponding astronomical symbols. This disc has a window along the edge for reading the days and is engraved in the centre with a double-headed eagle in relief. The central disc, made of gold-plated brass, is engraved on both sides with inscriptions useful for the other two discs and borders them. The Read More...

Hexagonal equatorial sundial in gilded brass and silver made in Augsburg made circa 1690/1700 signed Johann Willebrand

Hexagonal equatorial sundial in gilded brass and silver. Latitude arms (from 10° to 90°) mounted on a hinge. Compass on a golden background indicating the cardinal points with a steel needle and brass pivot. At the base of the compass, there is a plumb level to adjust the dial to a horizontal position. On the back there is an important list of latitudes and the signature “Johann Willebrand In Augspurg 48.” In its original black leather case with pink Read More...

Bock Steger Anatomical model, C 1895.

Didactic anatomical model in hand-painted plaster circa 1895 depicting a human heart. Engraved with the maker’s mark Franz Josef Steger and Carl Ernst Bock: “Bock Steger – Lips / G. Steger Schkenditz “. The notation “Lips” stands for Leipzig. The model is on an enlarged scale to provide a better view for learning. Sculptor Franz Josef Steger (1845 – 1938) collaborated with anatomist-pathologist Carl Ernst Bock (1809 – 1874) at Leipzig University to produce models for student teaching. These were Read More...

An impressive brass surveying protractor 45cm diameter and 70cm lenght, early 17th century

An exceptionnal brass protractor for surveying uses measuring 45cm diameter and 70cm lenght. The semi-circle is finely engraved and divided. The middle part is built has a large dividers with decorative parts serving to use the move the protractor. The long arm measures 70cm. The piece is original but was re-engraved in metric system in the early 19th century. The sights are now missing. An exceptionnal instrument by its size. Read More...

C1900 Cased German Insectoscope

A good cased C1900 German insectosope. Slides are spring-loaded and the spring functions well. Height: 2.25″ .There are 3 slides in the case but they are too large for this scope.  Read More...

~EXCELLENT SET OF CENTERING OBJECTIVES-ZEISS C.1890~

Cased set of petrographic/petrological/polarizing and centering objectives by Carl Zeiss, Jena c.1890. All signed and serialised with early lettering system used only by this German manufacturer. Maroon case measures 15 x 11 x 5 cm. with brass clasp/hasp and dark blue velvet interior. Marked “Schlitten Objektivwechsler” (sliding objective changer). All objectives are mounted on  heavy bayonet/bevelled flanges/collars with worm and screw adjustment by square key (will find). The objectives (from upper left) are as follows: 1)  Apo. a* (1 1/2 inch) with correction collar 2) Read More...

Simon & Halske Telegraph, Germany, early 1900s

Simon & Halske Telegraph, Germany, early 1900s Simon & Halske & Co. telegraph, Germany, with a large paper roll in the drawer, numbered 52473, dimensions 26 x 28 cm, 18 cm high  Read More...

Two electric wire coils E. Leybolds

Two wire coils for fundamental experiments with induction  from the company E. Leybold’s successor A.G. Cologne, ca. 1920. Dimensions: 16 and 20 cm.  Read More...

Anatomical horse model, C 1920.

An Anatomical horse model by Somso. A large c. 1920 German anatomical model of a horse probably by Somso. Hand painted papermaché and plaster on rectangular wooden base, not signed The model consist of 10 parts. The following internal organs are present: stomach, pancreas, heart, liver and kidneys. What we are missing are the lungs, spleen, small intestine and bladder. If it is a mare, which I doubt, then the uterus and ovaries are also missing. At that time, the Read More...