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04 Nov

Early Ernst Leitz microscope (1889)

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Fantastic antique brass microscope by E. Leitz Wetlzar, manufactured in Germany in 1889, well-preserved and in good working order. Despite being over 130 years old, the microscope functions correctly. It is made entirely of brass; the metal retains its original lacquer with some specks and wear on one side of the base. The serial number 16202 is engraved on the back of the instrument and is repeated on the case. The microscope comes in its original mahogany wooden case and Read More...
03 Nov

Early Carl Reichert microscope (c.1880)

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Antique Austrian Reichert microscope, manufactured in Vienna, Austria around 1880, in good working order and condition. The microscope features a horseshoe-shaped base in black enameled metal and brass; the upper section combines brass pieces, some gilded and others black, with chrome-plated metal. The brass shows some signs of wear from age and use, which lend this instrument a unique patina of authenticity. The design includes a revolving nosepiece with three lenses, all original to the brand, and two eyepieces. Read More...
03 Nov

Carl Zeiss microscope Stand VII (1886)

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Fantastic brass microscope manufactured at the end of the 19th century based on the model VII, in an excellent state of preservation. It has the number 10228, so it was built approximately in 1886. Despite its simplicity, it already transmits the great quality of all Zeiss products, with perfect finishes and magnificent lenses. The set contains 4 eyepieces, as well as 4 objectives from the manufacturer (F, D, B, 1/12 mm homog immersion). It keeps the light limiters to 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...
02 Nov

Antique Stand 1B Brass Monocular Microscope by Ernst Leitz Wetzlar c1901, Cased

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Antique Ernst Leitz Wetzlar – Monocular Brass Microscope – Stand 1B circa 1901, Cased Offered for sale is a good working condition example of a compact Leitz monocular Stand 1B model in brass, supplied with a correct matching-numbers hardwood storage case. Here we have a good example of an antique monocular brass microscope by Ernst Leitz of Wetzlar in Germany, bearing production reference number 62839, which according to my Leitz dating table means that this example was manufactured in 1901.  The Read More...
28 Oct

Antique portable German Microscope (c.1880)

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Portable microscope of German origin, manufactured around 1880. The support is the carrying case itself. The mirror has some discoloration but the set is fully usable. A good example of a microscope used by rural doctors who traveled to visit their patients. The big platform was to make observations of trichinosis.   US buyers will have to add 15% tariff Shipping to UE is 25€, UK 35€ and worldwide 75€   Read More...
23 Oct

Inclined Plane by Max Kohl, circa 1900

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A large wooden inclined plane which was used to demonstrate the laws of falling bodies and to determine the coefficient of friction between two surfaces. The trolley and the scales are later but the plane is in perfect original condition with its three wooden feet. 60x40cm. 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...
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