Original old media broadcast equipment trade magazine vintage ad for  WJJD and WFMF.  Bob Elson announcer for the Chicago White Sox exclusively on Marshall Field Radio Stations.  Represented by Avery-Knodel.  One of American's leading sports announcers.  13 consecutive World Series and 8 All Star Baseball games.  This unique old 1948 broadcasting advertisement would display beautifully matted and framed.