Demonstration Telephone by Leybold, c. 1915

Demonstration Telephone by Leybold, c. 1915 Marked: "E. Leybold's Nachfolger, Köln" (E. Ley bold's Successor, Cologne). With carbon granule microphone, resistance, switch and box earphone. Demonstr

United States,Dated 1915 Photograph and pamphlet of a 1915 transcontinental telephone demonstration at Infantry Hall in Providence, R.I., accompanied by original chapter No.40 museum label. Photograph

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

Föderl-System Signal Transmitter Telephone, c. 1915 Austrian 4-lever telephone, semi-automatic dial system, manufactured probably by Czeja & Nissl, Vienna. Serial no. 780. Stellhebelapparat System F�

L.M. Ericsson Jydsk Desk Telephone, c. 1915 Signed: "Jydsk Telefon Aktieselkap", manufactured by Kristian Kirks Telefonfabriker in co-operation with Ericsson, metal housing with crank handle, horn-ty

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.,

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

Electro-Magnetic Motor with Rotating Geissler Tube, c. 1915 Physical demonstration model, height 9 7/8 in., tube length 10 1/5 in., good condition, untested. Elektromagnetischer Motor mit rotieren

Group of Vacuum Tubes, c. 1915 Physical demonstration models. 1) Geissler tube lighting up by friction, length 19 1/3 in. – And: 2) 10 various Geissler tubes, 2 of them liquid-filled, some uranium

United States,Circa 1915 Wood case, hand-cranked magneto. Signed on brass tag "Stewart Bros. Ottawa, Illinois. Case 8 3/4" x 4".,Wood, metal

2 Lecture-Room Measuring Instruments, c. 1915 Manufactured by E. Leybold's Nachfolger – Cöln. 1) Direct current ammeter, reading from 0,2–2 amperes, with shunt up to 20 amperes. – And: 2) Dire

Antique Early 20th c. Brass Candlestick Telephone. Pat dates 1904-1915. This telephone is constructed of brass with black bakelite ear and mouthpiece. Complete with original Bell System Box with bell

4 Telephones 1) Ericsson table phone, model 381, original handset, demonstration model without tin cover, c. 1902. - 2) French candlestick telephone by A. Burgunder, with second earphone by Unis Fran

'Automatic Bookkeeping Register, Serial No. 2, c. 1915 A "one-off" machine that won the Gold Medal at Panama-Pacific International Exposition in San Francisco. Manufactured by The Automatic Bookkeepin

"The Gramophone" with Glass Horn, c. 1915 Oak case with original decal, metal reproducer, cut glass horn (damaged on rim), Ø 10 1/5 in., good playing condition. "The Gramophone" mit Glastr

Ericsson "Coffin" Wall Telephone, c. 1880 L.M. Ericsson, Stockholm, Sweden. One-piece walnut case, rare carbon pencil microphone, consisting of 4 carbon pencils mounted in brass sleeves and thin metal

First Siemens & Halske Butterstamp Telephone, c. 1878 Siemens & Halske, Berlin. D.R. Patent, no. 3671, stamped "1528U - 205E", with whistle for calling, turned wood, lateral screw for fine adjustment,

Very Early Siemens & Halske Butterstamp Telephone, c. 1880 Siemens & Halske, Berlin. D.R. Patent, underside stamped "27560 - 1702U - 204E", with whistle for call-ing, turned wood and brass, leather-co

Painted Art Noveau storefront C 1915 having central double doors flanked by store windows accessible from the inside. >The central glass sign painted B Sturlese. Dismantles for transport. Ht: 114" Wd:

Antique 18K Gold VACHERON & CONSTANTIN Chronometer Royal Mens Open Face Pocket watch c.1915* 57 mm EXLNT* RARE! ​​ This VACHERON & CONSTANTIN​ pocket watch is Swiss made.. Great pres

"L.M. Ericsson Model BC 2050" Telephone, c. 1892 Sweden, table model, walnut case, nickel-plated metal parts, handset with speaking horn. Tischtelephon L.M. Ericsson Modell BC 2050, um 1892 Schwedisch

Breweriana Sign, Indianapolis scene supporting union labor, c.1915, VG+ cond w/some prof repairs & closed tears, in period oak frame w/museum glass, 26.5"H x 18.5"W.

Very Early Kipp & Zonen Butterstamp Telephone, c. 1880 Underside stamped "P.J. Kipp & ZN, Delft", turned wood and brass, leather-covered handle, underside with fine adjustment, height 7 ½ in. - V

Very Early Siemens & Halske Butterstamp Telephone, c. 1880 Siemens & Halske, Berlin. D.R. Patent, underside stamped with "13363 - 1823U - 204E ", turned wood and brass, leather-covered handle (leather