Sprite - "Happy Holidays" (Commercial, 1977)
Not from a Chicago airing, but still appropriate - here's a Christmas themed commercial for Sprite soft drink, set to the tune of the famous Christmas carol "Good King Wenceslas."
Note that there are some problems with the film in the first few seconds.
"The taste of limon mixes right / On holiday occasions."
This aired on local Chattanooga, Tennessee TV the first week of December 1977.
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