This 40 kopeck Soviet stamp, issued on May 7, 1960, commemorates the Central Museum of Communications named after A.S. Popov in Leningrad (now Saint Petersburg). The stamp showcases the museum's historic building alongside a stylized radio transmission tower, symbolizing advances in telecommunications. It honors Alexander Stepanovich Popov, a pioneering Russian physicist regarded as one of the inventors of radio. The issue marks Radio Day, celebrated annually in the USSR to highlight achievements in communication technology.