User:Outmanzhang

Aug. 26, 1939. First major league baseball game telecast, a double-header between the Cincinnati Reds and the Brooklyn Dodgers at Ebbets Field, Brooklyn, announcer Walter L. "Red" Barber or Bill Stern (sources differ), on W2XBS.

http://jeff560.tripod.com/chronotv.html

Just five months after the introduction of TV in the United States, P&G airs its first TV commercial (for Ivory Soap) during the first televised major league baseball game.

http://www.pg.com/translations/history_pdf/english_history.pdf

The first television advertisement was broadcast in the United States in 1939 just 5 months. The watchmaker Bulova paid $9 for a placement on New York station WNBT before a baseball game between the Brooklyn Dodgers and Philadelphia Phillies. The 10-second spot displayed a picture of a clock superimposed on a map of the United States, accompanied by the voice-over "America runs on Bulova time."[3][4] The first TV ad broadcast in the UK was on ITV on 21 September 1955, advertising Gibbs SR toothpaste. The first TV Ad broadcast in the Philippines was on ABS-CBN in 1960, advertising Tide detergent powder. Until the early 1990s, advertising on television had only been affordable for large companies willing to make a significant investment, but the advent of desktop video allowed many small and local businesses to produce television ads for airing on local cable TV services.