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15 Oct

Large German five draw aluminium telescope by Busch.

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A large brass aluminium telescope measuring 11″ when closed and 46.5″ when open.  There are no dints to the brass; the lenses are damage free and the telescope gives an excellent clear image when viewing. The main lens is just under 70 mm diameter; with end cap and dust slider. The tubes are free sliding. Signed on the first draw, ‘Busch 36 x’. It gives excellent, clear views.  Busch worked in Germany from 1845. The company joined with Zeiss after 1945. Read More...
13 Oct

Extremely rare Wanka’s double gyroscope, circa 1896

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Very rare model of a double gyroscope after Joseph Wanka, not signed but certainly by a German maker as Max Kohl or Leybold. Wanka presented his new double gyroscope in 1896. The model know of this form seems really rare. The condition is excellent. 22 height / 26,6 width. See here for a Leybold’s catalogue : https://cnum.cnam.fr/pgi/fpage.php?M9915_1/82/100/882/0/0 Read More...
12 Oct

Vintage weather station with compass

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Vintage weather station, incl. compass, barometer, hygrometer. made by Luft Germany Read More...
09 Oct

SOLD – Antique Ernst Leitz Wetzlar – Stand GF Brass Microscope – circa 1911, Cased

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Antique Ernst Leitz Wetzlar – Monocular Brass Microscope – circa 1911, Cased Well-kept and very good working condition example of a mid-size Leitz monocular model in brass, supplied with a good quality matching-numbers hardwood storage case.  This example appears to be a model GF as shown in the 1913 Leitz catalogue – see final image in listing photo stream. Here we have a good example of an antique monocular brass microscope by Ernst Leitz of Wetzlar in Germany, bearing production reference Read More...
08 Oct

A crooks type spetroscope by Peter Desaga in Heidelberg, 1860s’

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A are example of a dismountable Crooks type curved spectroscope with the rare and valuable German signature P. Desaga Heildelberg. The curved Crooks type spectroscopes are quite rare and Desaga signature also. Peter Desaga is an instrument maker at the  University of Heidelberg, who worked with Robert Wilhelm Bunsen. In 1855, Desaga perfected an earlier design of the laboratory burner by Michael Faraday into the Bunsen Burner. The Desaga family held the right to market the burner for generations, as part Read More...
04 Oct

Rare microscope signed “Weickert, Leipzig”

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Rare microscope signed “Weickert, Leipzig”, early 19th Century. The box is missing but the microscope is in good conditions.   “[…] This manufacturer is Johann Dankgott Weickert (1751/52 – 1816). JD Weickert was a university mechanic and optician in Leipzig and, as Reinthaler’s successor, produced some scientific instruments himself in addition to his main work – the maintenance and repair of instruments. Otherwise, in the literature known to me, there is neither a photograph of a microscope, nor of any other instrument, Read More...
03 Oct

Early stand VIIb Zeiss microscope (1881)

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Microscope with fixed tube length made of lacquered and blackened brass, blued steel. The instrument is roughly adjusted by hand by free movement, while fine adjustment is made via a knurled wheel on the column. The plane and concave mirror is mounted on a rotating and swiveling bearing. It has three objectives (A and DD in their matching cans and a Winkel one in a CC Zeiss can). Eyepieces are originals and numbered 2, 4 and 5, com els Read More...
28 Sep

7 inch terrestrial globe clock, German, circa 1905 – 1907.

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A 7 inch terrestrial globe clock, German, circa 1905 – 1907. The terrestrial globe, with countries and oceans indicted in French, is mounted in a half meridian, with an equinoctial colure and a solstitial colure, the equatorial horizon ring is divided into two twelve hour half days, full rotation from west to east every 24 hours, as the clock mechanism rotates the globe local time can be calculated. Turning the globe moves the clock’s hands, and turning the hands move Read More...
26 Sep

Hoffmann voltaic-electric brush by Engeler & Sohn, circa 1880

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A rare voltaic-electric brush based on the design of Professor Hoffmann of Berlin, bearing the Berlin maker’s mark “Engeler & Sohn in Berlin.” The brush is in fine condition and complete with its two copper plates. This type of brush was used to deliver an electric current continuously and evenly across the skin via hundreds of metal wires, which in this instance are surrounded by soft bristles. Wood, brass, and copper. 14 x 7.5 cm.  Read More...
18 Sep

Two telescopes in a fitted case – German connection.

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The larger telescope has six draws and is signed, ‘Paetz & Flohr, Berlin’. It opens up to a length of 36″ (91 cm) and 8.75″ (22 cm) when closed. The main lens has a diameter of 48mm giving a magnification of 40x with a clear sharp image. This is quite a rare telescope, the company produced instruments around the mid 19th century. The other telescope is a three draw, signed, ‘W. Harrison & Co, 50 Holborn, London & at Hamburg’. Read More...
10 Sep

19th-century German Döbereiner lighter

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This 19th-century German Döbereiner lighter is an exceptional example of early chemical technology. The clear glass casing features the authentic, brass-clad mechanical flap mechanism at the top and the corresponding internal glass tube construction. The item is in good, original antique condition, Dimensions: 8 inches high; the glass cylinder has a diameter of 4 inches Will be very well packaged and sent by registered post Read More...
10 Sep

An X-ray tube by Emile Gundelach, ca. 1900

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An X-ray tube by Emile Gundelach, ca. 1900 In perfect condition, numbered 03081 Dimensions: total length 14 inches, bulb diameter 4.5 inches Will be packed very securely and shipped via certified mail  A \”G\” mark—specifically a large letter \”G\” containing an etched or hanging scale logo—on an antique cold-cathode X-ray tube indicates it was manufactured by E. Gundelach, a prominent German glassblower and early X-ray tube maker based in Thuringia, Germany Read More...
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