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13 Dec

GERMAN CHEST-TYPE MICROSCOPE c.1810-20 – REDUCED

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A GERMAN CHEST-TYPE COMPOUND MICROSCOPE c.1810-20 Attributed to C. Oechsle Dimension: 15 ¼” (39cm) high; case 13 ¼” (34cm) x 5 1/8” (13cm) x 4 ½” (11,5cm) Fully complete with many accessories, As in photos, this microscope is very complete in accessories, perfect working condition and remarkable conservation. The walnut case is in perfect condition. Original key and lock. An untouched microscope in its original patina. Although unsigned, this microscope can be attributed to Carl Oechsle of Esslingen (Germany). This “chest-type” microscope is almost identical Read More...
02 Nov

Planispheric Astrolabe – Equinoctial Dial, late 16th–early 17th century

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Origin: Probably Southern Germany (Nuremberg or Augsburg) or the Flemish region (Louvain or Antwerp). Date: circa 1580–1620 Material: finely engraved brass Diameter: 9 cm   A beautifully crafted planispheric astrolabe or equinoctial sundial, dating from the scientific Renaissance. The instrument features a rotating rete and latitude circles engraved with major European cities, allowing adjustment for various locations.   Principal Latin inscription:   “Ni certa solis lumina de vient” (“Even the rays of the sun are uncertain [or inconstant].”) A philosophical reflection on time and change, typical of German Renaissance scientific Read More...
02 Nov

18th Century Octagonal Brass Sundial Signed “Johan Schrettegger,

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Exceptional 18th-century octagonal brass sundial, signed “Johan Schrettegger, Augsburg”, featuring a blued steel needle, a folding latitude arc engraved 10°–90°, and an engraved equinoctial hour ring with folding gnomon.   This finely made instrument exemplifies the precision and craftsmanship of Augsburg’s scientific instrument makers, who were renowned throughout Europe during the Enlightenment for their accuracy and elegant design.   Compact and beautifully preserved, the piece combines scientific functionality with decorative sophistication.   Dimensions: 5 × 5 × 1 cm (2 × 2 × 0.4 in). Read More...
02 Nov

19th Century Horizontal Bronze Sundial After Erasmus Habermel

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Fine 19th-century horizontal sundial, crafted in bronze, inspired by the designs of Erasmus Habermel (ca. 1538–1606, Prague), one of the most celebrated instrument makers of the late Renaissance.   This piece faithfully reflects the scientific precision and aesthetic refinement characteristic of Habermel’s original instruments, combining functional accuracy with ornamental engraving and elegant proportions.     Dimensions: 14 × 10 × 10 cm (5.5 × 3.9 × 3.9 in).   Read More...
02 Nov

18th Century German Gilt Brass Portable Sundial Signed “J. Vogler”

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Exceptional German portable sundial, finely engraved and gilt brass, signed “J. Vogler”, and preserved in its original fitted case. Made in the 18th century, this exquisite instrument exemplifies the precision and artistry of German scientific craftsmanship, likely from one of the leading centers of instrument making such as Nuremberg.   The piece features detailed engraving, elegant design, and beautiful gilding, demonstrating the perfect balance between scientific function and decorative refinement.   Dimensions: 6 × 6 × 1 cm (2.4 × 2.4 × 0.4 in).   A Read More...
22 Oct

A rare 18th-century microscope magnification slider with five magnifications in complete condition.

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This is a rare 18th-century microscope with a magnification slider offering five distinct levels of magnification, and it is in excellent condition. While it could have functioned autonomously, however, the presence of the rail with the stops suggests it may have been part of a larger instrument. There are limited options for the maker of this instrument, as only a few manufacturers utilize such sliders. I’ll leave further research to more knowledgeable experts. Please also note the provided dimensions. Read More...
03 Oct

Double cone on inclined plane, C 1920

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The mechanical paradox consists in a double cone which is able to climb up along an inclined plane. The double cone rises when the slope of the inclined plane is smaller than the product given by the tangent of half the cone’s angle and the tangent of half the angle of slide’s opening. So the phenomenon has nothing paradoxical, but it is in perfect accord with the laws of mechanics. Length Cone 32 cm and begin 20th century. Look for Read More...
02 Sep

Three full brass dividers by Adolf Deinert, Nuremberg, c.1740

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A set of three rare full brass German pair of dividers bearing the hallmark of the famous weightmaker from Nuremberg, the wheel, Adolf Deinert. These three full brass pair of dividers measure 10,7cm, 9,9cm and 7,5cm lenght. The points are not reduced and the instruments are in genuine condition. A rare German signature on pairs of dividers. Read More...
13 Aug

Brendel Salvia flower model, No 111, C 1880

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The Salvia flower model, No 111, consists of five handpainted papier mache removable parts which are 15 times enlarged. The pistil can be secured with a pin in the petal and between the stamens. The flower tissues are hold together by hooks. The reproductive organs together are placed in the flowerbase. A wooden stem leads to the ebonized decorated base, which has blue sticker. The sticker is marked: ‘No. 111 Salvia Officinalis. L. II 1. flos  Commn Sage Salbei. Read More...
13 Aug

Brendel Linaria model No 110

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A Brendel Linaria flower Model by Robert Brendel, circa 1880. The flower model consist of three parts. Brendel (1821-1898) started on the middle of the 19th century a factory for botanical flower shaped in breslau, now wroclaw in poland. Height 50 cm. Read More...
08 Jul

A German anatomical model of the larynx, by Bock-Steger

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A German anatomical model of the larynx, by Franz Josef Steger after a design of Carl Ernst Bock, from the late 1800’s.Hand painted plaster, in great condition: I can only notice few chips on the base and the missing rear cover of the throat. .Life-size, overall height is 33 cm. There are 2 known versions of this model: this is the one with the tongue out of the mouth, my preferred one Read More...
19 Jun

4 anatomical models to teach a deaf person the pronunciation of letters and sounds

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4 amazing anatomical models to teach a deaf person the pronunciation of letters and sounds, showing the right position of the tongue and of the mouth/lips, I’d guess from the late 1800’s and most likely from a German maker. Hand painted heavy plaster, each of them comes with the “represented” letters/sound embossed in the low right corner: “gh”, “f”, “g”, “j”. In great condition, just few light traces of the age, measurements of each model are 30 x 24 cm Read More...
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