| 1923 |
| Theodore F. MacManus helps Walter Chrysler launch his new car, the Chrysler Six. |
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| 1923 |
| National Carbon Co.'s "Eveready Hour" is the first regular series of broadcast entertainment and music to be sponsored by an advertiser. |
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| 1925 |
| The National Better Business Bureau is organized. |
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| 1927 |
| Columbia Broadcasting System, a second major radio network, is launched. |
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| 1928 |
| Lintas (Lever International Advertising Services) is formed as a house agency for Unilever in England, Holland and Germany. |
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| 1928 |
| Barton, Durstine & Osborn merges with the George Batten Co., forming Batten, Barton, Durstine & Osborn. With billings of $32 million, it becomes one of the biggest shops. |
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| 1929 |
| Following the stock market crash, advertising spending plummets. From its high of $3.5 billion, it sinks to $1.5 billion by 1933.. |
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| 1923 |
| John Orr Young and Raymond Rubicam form Young & Rubicam in Philadelphia. They move to New York at the request of General Foods in 1926. |
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| 1924 |
| Goodrich Tires sponsors the first hourlong show over a network of nine radio stations. |
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| 1926 |
| Radio Corp. of America buys New York radio station WEAF from AT&T and renames it WNBC. It forms the first radio network with 19 stations within the year, and the National Broadcasting Co. is launched. |
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| 1927 |
| The Federal Radio Commission is established. |
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| 1928 |
| "The Lucky Strike Dance Orchestra" show, later renamed "Your Hit Parade," debuts over 39 NBC stations. |
 Archive Photos |
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| 1929 |
| William Benton and Chester Bowles open Benton & Bowles. |
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| 1929 |
| American Tobacco Co. spends $12.3 million to advertise Lucky Strikes, the most any company has ever spent on single-product advertising. |
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