This ad for WDGY radio appeared 75 years ago today, in the July 10, 1944, issue of Broadcasting.  The ad maps the station’s impressive coverage area, and notes that letters were recently received from over 96,000 letters from listeners.  The letters all included a boxtop for Waldorf Crackers, and were part of a promotion for an afternoon program.

The station is currently KTLK, with a similar pattern with its nine-tower array beaming north at night.  The WDGY call letters are in use by an oldies station serving the Twin Cities market from its Hudson, WI, city of license.