| Y/M/D | Description | Place |
|---|---|---|
| 1880/00/00 | After 1880, lithographed view books produced by the Chisholm Brothers company of Portland, Maine, begin to feature photographic halftones and from these will evolve the first picture postcards in the United States. | |
| 1893/12/00 | Charles Goldsmith sells a total of 1,858,000 picture post cards, 2 for 5 cents via vending machines, at the World's Columbian Exposition in Chicago. The multi colored cards include the Administration, Electrical, the Fine Arts and the Machinery buildings. | Jackson Park Historic Landscape District and Midway Plaisance, Chicago |
| 1894/00/00 | The American Lithographic Company sells an estimated 2,000,000 picture postcards featuring the World's Columbian Exposition in Chicago from a deal made by Charles Goldsmith. | Jackson Park Historic Landscape District and Midway Plaisance, Chicago |
| 1895/00/00 | Adam Leighton makes a deal with the House of Frey, Frankfurt-am-Main, Germany, to publish quality color cards. Thus begins the classic period of the color picture postcard in America which will produce some of its finest examples of lithographic art. | |
| 1904/00/00 | Hugh Leighton and his father, Adam, establish the Hugh C Leighton Co in Portland, Maine, for many years the largest postcard manufacturer in America. They had over sixty million cards in stock at the height of the company's business. |
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