Telephone sets in the changing times - Germany / German Democratic Republic 1989

Telephone sets in the changing times With the depictions of telephone sets over the ages, the Ministry of Posts and Telecommunications of the German Democratic Republic is issuing four multicolored special postage stamps, one after the other, in unison. Special cancellations from February 7 to April 6, 1989 Telephone sets through the ages This series of stamps introduces telephone sets from the first half century of their development. In addition to the phone of Philipp Reis (1834-1874), which did not come to practical use, three of the German Reichspost used local battery devices (power supply by batteries at the subscriber) are shown. The advantage of the since 1888 approved desk devices, of which on the 85-Pfennig value the model OB 05 of 1905 is to be seen, was the mobile listing on desks and thus a more comfortable handling. With the development of the table apparatus, it came to the union of microphone and handset to the handset. By putting the remote earpiece to the ear, the speech funnel was automatically placed in the correct speech position. The alarm clock was completely in the housing made of black lacquered sheet metal with wooden base and cover plate. A second crank facilitated the operation of the crank inductor and thus of the apparatus from all sides. The nickel-plated hookswitch, which was in the idle state, replaced the hook switch. The telephone sets presented on this series of stamps as well as others from these and later stages of development can be viewed in the postal museum of the GDR.