Wheatstone Bridge "Siemens & Halske", c. 1890

Measuring Bridge by Siemens & Halske, c. 1890 Thomson measuring bridge with sliding wire, for resistance measurement from 0,1 to 0,000001 ohms, upper part with circular plug rheostat, with 10 plugs an

Telegraph Station by Siemens & Halske, c. 1890 No. 55363, ink-writer, original lacquered brass, with relay and Morse key, drawer with paper strip, on original telegraph station table, size 35 &#

Siemens & Halske Telegraph Station, c. 1890 Complete telegraph ink-writer equipment containing brass telegraph (serial no. 81891) with clockwork motor (working), relay, galvanometer and Morse key, on

Siemens & Halske M89 Wall Telephone, c. 1890 Polished walnut case, serial no. 23140, carbon pencil transmitter, serial no. 53506 M 1889B, 2 Siemens & Halske earphones, serial nos. 124863 and 124253, i

Telegraph Station by Siemens & Halske, c. 1895 Berlin, No. 30561, consisting of spring-driven ink-writer telegraph (working), Morse key, galvanometer, relay and plug bridge, on wood base with no. 392.

Eight Precision Instruments, c. 1890-1910 1) Crank rheostat, Siemens & Halske, six changeable decade resistors, manganese wire-winding, in mahogany case, 14 ½ x 9 in. - 2) Crank resistor, Sieme

2 Compensation Devices, c. 1930 1) Variable manganin tension divider according to Raps, manufactured by Siemens & Halske, 5 decades, with lid. - And: 2) Thomson bridge, manufactured by Otto Wolff, Be

Resistance Bridges and Wattmeter, c. 1910 1) Resistance bridge with rheostat by "Hartmann & Braun", no. 667, with earphone. - 2) Precision wattmeter by "Siemens & Halske". - 3) Measuring bridge, 3 ro

German Telegraph Station by Siemens & Halske, c. 1905 Ink writer no. 70276, spring-driven (working), original lacquered brass, with relay, galvanometer, lightning protection and Morse key, drawer with

Morse Telegraph by Siemens & Halske, c. 1885 No. 9288, original lacquered brass, clockwork (working), ink-writer telegraph, drawer with paper strip in plinth base. Morse-Telegraph von Siemens & Halske

Morse Telegraph by Siemens & Halske, c. 1895 No. 13883, original lacquered brass, clockwork (working), ink-writer telegraph, with separate paper strip spool. Morse-Telegraph von Siemens & Halske, um 1

German Telegraph Station by Siemens & Halske, c. 1900 Berlin. Ink-writer no. 73386, spring-driven (working), original lacquered brass, with galvanometer and Morse key, drawer with paper strip. Deutsch

Ink-Writer Telegraph by Siemens & Halske, c. 1870 No. 55890, oak base with drawer for the paper strip, low-noise key no. 35422. - In addition: Galvanometer in walnut case. Farbschreiber-Telegraph vo

'Large Induction Coil by Siemens & Halske, c. 1910 For "Gesellschaft für drahtlose Telegraphie", type RF ms2, 17 ¾ x 9 7/8 x 11 2/5 in. 'Großer Funkeninduktor von Siemens & Halske, um 1910 Für "Ge

Telegraph Station by Siemens & Halske, c. 1895 Berlin, no. 20951, consisting of spring-driven ink writer telegraph (working), Morse key, galvanometer and relay, on oak base with drawer for the paper s

Early Radio Components 1) Tickler by Siemens & Halske, c. 1914, model RB 30/4, no. 11069, (grinder), for listening to high-frequency signals by grinding a thin steel wire over a rotating metal disc, r

8 Early Morse Keys 1) L.M. Ericsson & Co, Stockholm, c. 1880. – 2) Silent key by Siemens & Halske, c. 1871. – 3) Camel-back key, USA, c. 1870. – 4) Allei key, iron baseplate, c. 1935. – 5) Ge

German Morse Ink-Writer Telegraph by Siemens & Halske, c. 1895 Berlin, no. 63467, original lacquered brass, spring-driven (working), on walnut base. Deutscher Morse-Farbschreiber von Siemens & Halsk

Two German Desk Telephones 1) Siemens & Halske, c. 1921, desk station for internal telephone calls, 25-section number switch, call button, black-lacquered metal case, external bell, handset with speak

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

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

Very Early Siemens & Halske Butterstamp Telephone, c. 1880 Siemens & Halske, Berlin. D.R. Patent, underside stamped 41481, turned wood and brass, leather-covered handle, whistle for calling, underside

Very Early Siemens & Halske Butterstamp Telephone, c. 1880 Siemens & Halske, Berlin. D.R. patent, underside stamped "2200U", turned wood and brass, leather-covered handle, whistle for calling, undersi