XEQK

1350 AM XEQK broadcasts a Tropical music in Mexico City, Mexico.  They are owned by the Instituto Mexicano de la Radio which was established in 1983 and operates 17 terrestrial radio stations throughout the country.
XEQK signed on the air in 1938 and soon began broadcasting the time every minute on the minute interspersed with commercial announcements.  Somehow, this format became a success and the station became known as "La estacion de la hora exacta," (The exact time station.)  The exact time came from the National Astronomical Observatory which at that time was located in Tacubaya near Mexico City.