Obverse: the obverse depicts a stylized radio and telecommunications tower surrounded by concentric waves symbolizing the transmission of radio signals. Around the design appears the inscription “100 Years of Bulgarian Communications” and the dates “1879–1979”.
Reverse: the reverse features the coat of arms of the People's Republic of Bulgaria with a lion in the center, wheat wreaths, and a five-pointed star. The denomination “5 Leva” and the year “1979” are shown below.
About the coin: this silver coin was issued to commemorate the 100th anniversary of Bulgarian communications services. It honors the development of postal services, telecommunications, radio broadcasting, and other communication networks that contributed to Bulgaria’s technological and economic progress.