Demonstration Model Telegraph, c. 1920

Including c 1910-1920 SIGNAL ELECTRIC CO Brass Bodied RADIO Telegraph Lever KEY and a WWII knee mount telegraph model j-37, Winslow tele-tronics. Measures 3" to 4" each

Tesla Coil Demonstration Model, c. 1915 With label: "Elektro Vulkan, Kromeriz", circular wood base, inner coil on porcelain isolator, outer coil on 3 glass columns, height 15 ¾ in., Ø 10 1/5 in.,

Bell Telephone Demonstration Model, c. 1900 Manufacturer: E. Leybold's Nachfolger, Coeln-Rhein. Open-works telephone model for demonstrating the mechanism, on mahogany base, very good original condit

Electrophysical Demonstration Model, c. 1890 France, marked "HRFA", mahogany, thick-walled glass container (fixed to the base), 6 electric connections, 2 coils, 2 electrodes inside of the glass, one s

3 American Steam-Engine Demonstration Models, c. 1910 1) Cast-iron model of a railroad locomotive engine, reversible, with Stephenson steering, hand-cranked, width 18 ¼ in. - 2) Steam motor, cas

Toy Morse Telegraph, c. 1920 Instrumentsfabriken "Fysik", Erik Weitzmann, Millerød, København, Denmark. Ink writer, brass, spring-driven (working), size only 7 4/5 x 3 1/6 x 7 in. Spielzeug-Morse-Te

Continental Typewriter Demonstration Model, c. 1935 Official model of Wanderer-Werke, Siegmar-Schönau, no. P072545, for demonstrating all functions of a typewriter, carriage movement defective, o

Group of Physical Demonstration Models, c. 1900 1) Wimshurst's influence machine, Trüb, Fierz & Cie., Zurich, height 14 ½ in., complete, rubber straps need to be renewed. - 2) 8 chromic acid

4 Interesting Physical Demonstration Models, c. 1900 1) Ebert's phosphorescent lamp with 2 electrodes. – 2) Crookes' apparatus for experiments on radiant matter. – 3) Crookes' radiometer. – And:

4 Physical Demonstration Models, c. 1910 1) Reflection and refraction apparatus by "Max Kohl, Chemnitz". – 2) Filament lamp on wooden stand. – 3) Voltmeter by "Radiguet à Paris", brass. – And:

3 Electro-Physical Demonstration Models, c. 1915 1) Stand with 2 copper spirals separated by a glass cylinder, with an incandescent lamp, height 13 in. - 2) Kolbe's electrometer, aluminum, standard b

2 Physical Demonstration Models, c. 1910 1) Crookes' radiant matter tube, height 16 ½ in. – And: 2) Winkelmann-type vacuum double bulb, 1 glass tip broken, height 15 ¾ in. 2 physikalische Demonstr

6 Physical Demonstration Models, c. 1910 1) 2 Leyden jars, height 15 and 20 ½ in. – 2) Discharger, with 2 ebonite handles and hinge. – And: 3) 3 conductors on glass pillars, one by Robert Droste

2 Electrostatic Induction Demonstration Models, c. 1900 Glass balls with hanging gold strips, conductors on the top, height 7 ½ and 9 7/8 in. 2 Demonstrationsmodelle "Influenz-Elektrizität", um 1900

Antique Cast Iron Red Fire Call Box w Telegraph c. 1920. Made by SAFA, the Superior American Fire Alarm and Signal Co. With innards complete and working telegraph and wires. Identifying mark as No. 12

Phonolamp Model C, c. 1920 No. 1058, phonograph table lamp, embossed tin case, fabric lampshade, electric motor (230 V), Supreme soundbox, overall height 29 1/2 in., working. Phonolamp Modell C, um 19

Large Dynamo-Electric Demonstration Machine, c. 1920 With maker's plaque: "Pleskot & Spol, Presna Mechanika, Praha". Handcrank-driven, large chain armature, on oak base, overall size 15 x 11 x 13 ¾

5 Physical Demonstration Instruments, c. 1920 1) "Mammoth" X-ray air-cooling tube with regeneration device, made by Cuthbert Andrews, England, length 20 in. - 2) Crookes cathode ray tube, for demonstr

DOLL drive model, fireman c. 1920, sheet metal, handpainted, 24 cm, used, good German Description DOLL Antriebsmodell, Feuerwehrmann ca. 1920, Blech, handlackiert, 24 cm, bespielt, gut

EDISON MAHOGANY FLOOR MODEL PHONOGRAPH, C. 1920, H. 44 1/2" W. 19 1/2"

Tenor Banjo, Slingerland Model 1, C.1920. Needs set-up, with hard case **Please Note: This item is NOT eligible for in-house shipping. Please refer to the terms and conditions of this auction for reco

Cast Iron Toy Truck and Tractor Assortment (16) items including (5) different models of c.1920 Arcade Fordson tractors; Arcade scoop having original decal; Arcade wagon #200 having cast markings; Arca

4 Demonstration Model Electric Motors, c. 1910 Various models and constructions, height up to 7 in., untested. 4 Demonstrationsmodelle Elektromotoren, um 1910 Unterschiedliche Bauformen und Konstru

This floor standing 1920 Diamond Disc Laboratoty model record player has a mahogany case, its original instructions, Original maintenance kit which includes needles, Edison Grease, and Edison Oil Can.