Mechanical Music Nov. 9: starting 2pm CET - Office Antiques / Science & Technology / Fine Toys & Automata Nov. 10: starting 10am CET

4 Monocular Opera Glasses1) France, c. 1880. Eyepiece surrounds embossed "Lunette par Invention et Perfectionnement", brass, bone body with stress...

2 Brass Spy Glasses1) Signed "Gilbert & Sons, London". 4 extensions, sculpted bone-covered body (with stress crack), Ø 1 ½ in., extended length 3 ...

Chevallier Spy Glass and 2 further Opera Glasses1) Eyecup marked "L'ING CHEVALLIER, OPTICIEN DU ROI - VIS A VIS LE MARCHÉ AUX FLEURS", brass, 5 ex...

Monocular Opera Glass, c. 1880Unmarked, 2 extensions, brass, bone and tortoise-shell body, stress cracks, length extended 4 in., Ø 2 1/3 in.Zustan...

Admiral Togo-Glas by Carl Zeiss Jena "Marine-Glas m. Revolver", c. 1896Carl Zeiss Jena. Serial no. 233. "Vergr. 5 & 10", rotating oculars, diaphra...

7 Spotting Scopes or Monocular Telescopes1) Nife, 5 x 25, NR5871, 1941. - 2) Spindler & Hoyer, 6 x 24, no. 9623, 1929. - 3) Carl Zeiss, 6 x 30 B. ...

Schmidt & Haensch Polarimeter, c. 1885Signiert: "Franz Schmidt & Haensch, Berlin, No. 2093", brass, length 28 in., dovetail rack-and-pinion compen...

3 Leveling Instruments1) Norton & Gregory Ltd., London. Polished brass, length 17 in., in case. - 2) "Ravina à Epenal?", brass, length 13 1/3 in.,...

La Filotecnica Precision Theodolite, 1915Ing. A. Salmoiraghi & C., Milano, no. 28113. Polished brass, 2 levels, 4 reading magnifiers, height 13 ¾ ...

French Graphometer by Gondelar, Paris, c. 1780Signed "Gondelar, Paris", brass, the protractor arch with engraved scales and 4 sighting vanes, silv...

5 Surveying Instruments1) Theodolite by Otto Fennel Söhne, Kassel. No. 38778, 3 magnifiers, 3 bubble levels, crackle-finish painted case, telescop...

Theodolite by Pistor & Martins, c. 1865Berlin. No. 1245, polished brass, silvered scales, bubble level (dry), telescope with rack-and-pinion focus...

3 Leveling Instruments1) Large surveyor's level by Meissner, c. 1915. Marked "A. Meissner - Berlin", no. 2493, black-lacquered and lacquered brass...

3 Surveyor's Crosses, 1820-40Brass, 2 hexagonal, 1 cylindric, each 4 ¾ in. high, with threaded bosses.Zustand: (3/-)3 Winkeltrommeln, 1820-40Messi...

7 Wood Boxes for Surveying Instruments, c. 1850 on wards1) Gebrüder Zimmer, Stuttgart. Oak, 10 5/8 x 7 ¼ x 3 1/6 in. - 2) Spruce wood, 15 2/5 x 6 ...

Irish Circumferentor by Walker & Son, c. 1805Surveying instrument, signed on the silvered compass scale "Walker & Son, Dublin", copper alloy, 2 sp...

Wild T2 Theodolite, c. 1930Swiss universal optic-mechanical precision instrument by Wild, Heerbrugg, no. 238, 2 bubble levels, prism for the verti...

X-Ray Tube by Leybold, c. 1929Cologne, with regenerator and separate unit for the connection to a Gaede vacuum pump, with ground-glass connector a...

Sliding Induction Coil based on Design by Du Bois-Reymond, c. 1890Manufactured by Ludwig Schulmeister, Vienna. An electrostatic generator, various...

Large Mercury Arc Rectifier, c. 1930Signed: "GEC Rectifiers Ltd., Stafford, England, 50549", large glass vacuum chamber, height 24 in., Ø 9 ½ in.,...

Early German Step Counter, c. 1780Zinc sheet and brass, soldered, silvered dial with hand-engraved numerals, 4 units up to 10.000 steps, size 3 ¾ ...

French Galvanometer by Carpentier, c. 1880J. Carpentier, Paris. Used for charge measurement and polarization, walnut case, original glass cover, o...

2 Physical Demonstration Instruments, c. 19001) Aluminum plate electrometer by A. Pichler's Wwe, Vienna. Brass, height 10 ½ in. - And: 2) Ohmmeter...

Group of 5 Electron Tubes1) Maltese cross tube, length 12 ¼ in. - 2) Goldstein tube, length 13 in. - 3) 2 Crookes tubes, height 12 ½ and 13 ¾ in. ...

Gundelach X-Ray Tube, c. 1915"Moment Röhre", with regenerator, etched serial no. 134442, glass bulb without damage, length 18 7/8 in.Zustand: (2/-...

Wimshurst's Electrostatic Machine, c. 1955Manufactured by Griffin & George, London. A pair of contrarotating discs with strips of tin foil on the ...

Small Wimshurst's Electrostatic Machine, c. 1920Toy and didactic model, disc diameter 7 in. Hand-turned, complete with Leyden jars, conductors, be...

Motor Mercury Interrupter, c. 1900Gianoli & Lacoste, Paris. With electric motor and glass container for mercury, on walnut base, size 8 ¾ x 11 ½ i...

2 Induction Coils and Physical Demonstration Models, c. 19101) Coil on mahogany base, 9 7/8 x 4 ¾ in. - 2) Sliding induction coil, 11 x 3 ½ in. - ...

Physics Catalogs 1910-1955, Annuals and Jubilee Publications1) Phywe, Hauptkatalog Physik, 1955. "Physikalische Geräte", 254 pages. - 2) Phywe, "E...

Physical Demonstration Models, c. 1910 1) Switch contact rheostat, with 3 decades, resistances are placed on the back, width 19 5/8 inch, height 1...

2 European Taxidermy Displays, c. 19201) Pair of pheasants in landscape, 40 x 9 ½ x 19 in. - And: 2) 9 birds, a bat and a stoat, with grass and br...

6 Physical Teaching DisplaysTopics: magnetism, acoustics, pressure, sound film, telephone and television. Size 24 4/5 x 36 1/5 in.Zustand: (3+/-)6...

Swiss Precision Construction Kit "The Automat", c. 1960Wood case with 3 detachable trays, consisting of hundreds of elementary gears, transmission...

Special Apparatus "Ondographe Hospitalier", 1902Instrument for autographically recording wave forms of varying currents, especially rapidly varyin...

Motor Mercury Interrupter by Max Kohl, c. 1900Chemnitz, Germany. With glass container for mercury, electric motor, porcelain switch, height-adjust...

French Precision Instrument, 1928Manufactured by F. Pellin, Paris. Engraved on the base "A.O. 14. 1928", brass, circular black glass plate over co...

3 Measuring Instruments1) Refractometer by Carl Zeiss in Jena, no. 1495, with flowing water temperature control, height 11 ¾ in., with case, c. 19...

Large Current-Generating Dynamo, c. 1910With label "Franz Hugershoff, Leipzig", original painted cast iron, large wheel Ø 12 ¾ in., electric motor...

Electrophysical Demonstration Model, c. 1890France, marked "HRFA", mahogany, thick-walled glass container (fixed to the base), 6 electrical connec...

Group of Electrotechnical Measuring Instruments1) Vaometer, Type R, Transforma, D.R.G.M. - 2) 3 wattmeters, with bulb sockets. - 3) Wattmeter, wit...

Lord Kelvin's Patent Multicellular Voltmeter, c. 1895No. 753, manufacturer: James White, Glasgow, patented 1888, original lacquered brass, leveled...

Foucault Interrupter Demonstration Model, c. 1890Manufacturer: A. Gaiffe, Paris. High-voltage interrupter for induction coils, electromagnetic dri...

Current-Generating Dynamo, c. 1900Hand-cranked, for generating 1,5 V AC, flywheel Ø 8 ¾ in., mahogany base 11 2/5 x 6 ¾ in., working.Zustand: (2-3...

Demonstration Model of the Tesla Generator, c. 19306 ¾ in. primary coil, 1 ½ in. secondary coil, glass pillar 19 in. high, wood base 16 1/6 x 9 ½ ...

Early DC Electric Motor, c. 1900Heavy cast-iron frame, height 15 in.Zustand: (3+/-)Früher Gleichstrom-Elektromotor, um 1900Schweres Modell aus Guß...

Ampere and Voltmeter, Galvanometer and Resistance Bridge, c. 1910 onwards1) Ampèremètre, Société Gramme, brass, Ø 6 in. - 2) Voltmeter, Hartmann &...

Measuring Bridge by Hartmann & Braun, c. 1900Germany, no. 6326, with 2 marble spindles, galvanometer and 3 rotating switches, in wood carrying cas...

Spark Coil with Vacuum Scale, c. 1920Ruhmkorff coil, length 7 ¼ in., with 5 vacuum tubes after design by Cross (0,01, 0,1, 0,3, 4, 30), overall he...

3 Teaching Precision Volt- and Ampermeters, c. 1920Large demonstration models in wood cases. 1) Max Kohl, Chemnitz. Height 13 1/3 in. - 2) Griffin...

2 Siemens & Halske Precision Measuring Instruments1) Universal measuring instrument, for telegraph and telephone line measurements, with crank and...

Induction Coil after Ruhmkorff, c. 1910For sparks up to 2 in., polarity changer, 6 V, 3 A, coil length 7 in., walnut base.Zustand: (2-3/2)Funkenin...

2 Early Electric Motors, c. 19001) Electromagnetic motor according to Froment, 2 electric magnets, on mahogany base, 8 4/5 x 5 ¼ in. - And: 2) AC ...

Sullivan Universal Galvanometer, c. 1920Moveable coil mirror galvanometer, manufacturer: H.W. Sullivan Ltd., Led Street, Peckham, no. 1173, brass ...

Resistance Bridges and Wattmeter, c. 19101) Resistance bridge with rheostat by "Hartmann & Braun", no. 667, with earphone. - 2) Precision wattmete...

Group of Antique Switches and Power Sockets, 1900 onwardsPorcelain, ceramic, bakelite, brass and other materials, predominantly up to 250 volts. 5...

Ediswan-Focus Prototype Projection Light Bulb, c. 1884Hand-blown glass, etched "80 XR 50 48B" and "Ediswan-Focus", Ø 3 1/6 in., coiled carbon fila...

Bulb Manufacturing ShowcaseFrom the empty glass housing to the finished light bulb, 11 parts, with inscriptions, size 17 1/3 x 9 ¾ x 4 ¼ in.Zustan...

Display Cabinet: "The Manufacturing of Philips Light Bulbs", c. 1930Showing chemical components and various construction phases of the glass body,...

Large Early Electric Light Bulb AssortmentMostly early 20th century, various filaments and constructions, examples by Philips, Pope, Osram and oth...