On January 31, 1931 the «Leningradskaya Pravda» newspaper reported about the new service for users of the local telephone network
The exact time telephone service worked from 9 am to 9 pm. The service fee was 50 copecks per month. The employees of the telephone company had a difficult and an important task — the time had to be accurate to the second.
- Address: St. Petersburg, Nevsky Prospect