​Original broadcasting media vintage magazine ad for MUTUAL BROADCASTING SYSTEM.  World's largest radio network is getting bigger and stronger.The recent addition of these powerful and highly rated stations in six major markets increases the already strong line-up up to 620.  KNEW San Francisco, WVBF-KNOX Boston, WWOK, Miami, WIBC-WNIR Indianapolis, WAME Charlotte, and KONO San Antonio.   Gary Worth, Vice President.  Main office was located at 918 16th St NW, Washington, DC.
​This 1973 unique old one page communications trade advertisement would display beautifully matted and framed.