Pavel M. Golubitsky (1845–1911) is an outstanding Russian inventor in the field of telephony.
P. Golubitsky’s inventions are as follows: a dipole telephone, a multipolar telephone; a coal powder microphone, a microphone with a comb-like arrangement of coal; a power supply system of subscribers’ microphones with a common battery situated in the central station, which provided the means of building large urban telephone networks; and a telephone switch to interconnect pair-wise several telephone lines. P. Golubitsky was a pioneer of telephone service implementation on railway transport.
The stamp provides a P. Golubitsky’s portrait and a phone set of his invention.
| Paper |
Printing method |
Perforation |
Format of the stamp |
Edition |
| Chalk surfaced |
Offset + security system |
Comb 12¼:12 |
42 × 30 mm |
154000 |