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Alternating-current, dual tone ringer, in wooden case

Inventory number: T16 D.160.0.
Year of creation: 1908
Location: Hall 1

Incoming calls are signaled on the telephone set by an alternating-current bell. Its main elements are: two inversely wound iron-core coils, permanent magnet, soft iron plate, anchor with the hammer and two metal bells of different compositions. The resistance of the bell of the LB set is 160 to 500 Ohm, number of windings 5000 to 10,000, and is actuated by currents of 10 to 15 mA. Double-gong bell section.

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