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Postal rates to 1847. Initial United States postage rates were set by Congress as part of the Postal Service Act signed into law by President George Washington on February 20, 1792. The postal rate varied according to "distance zone", the distance a letter was to be carried from the post office where it entered the mail to its final destination.
On April 12, 2007, the Forever stamp went on sale for 41 cents, and is good for mailing one-ounce First-Class letters anytime in the future—regardless of price changes. On the same day, the Postal Service also issued an American flag stamp with the text "USA First Class", whose value is fixed at 41 cents. [62]
Special postage stamps were issued for use with this service. [1] Domestic air mail became obsolete in 1975, and international air mail [2] in 1995, when the USPS began transporting First Class mail by air on a routine basis. [3] [4] All post-1977 United States stamp images are copyright of USPS. [5]
The U.S. Parcel Post stamps of 1912–13 were the first such stamps issued by the U.S. Post Office Department and consisted of twelve denominations to pay the postage on parcels weighing 16 ounces and more, with each denomination printed in the same color of "carmine-rose". Their border design was similar while each denomination of stamp bore ...
The Regular Issues of 1922–1931 were a series of 27 U.S. postage stamps issued for general everyday use by the U.S. Post Office. Unlike the definitives previously in use, which presented only a Washington or Franklin image, each of these definitive stamps depicted a different president or other subject, with Washington and Franklin each confined to a single denomination.
Low value definitives, 1873–80 (coloured corner letters) Low value definitives, halfpenny to 5d 1880–81. Penny Lilac 1881, the most issued Victorian stamp. High value definitives, 2/6 to £1 1883–84. Lilac and Green low value definitives 1883. Jubilee issue postage stamps 1887–92.
Faced in 1978 with the problem of supplying stamps to satisfy an anticipated postal rate increase that had not yet been specifically determined, the United States Postal Service issued a stamp bearing the letter "A" instead of a numerical denomination, announcing that this stamp would cover whatever new first-class postal rate was approved by congress.
After first- and second-class postage was introduced, Non-Value Indicated (NVI) stamps were produced marked "1st" and "2nd", valid for the lowest weight of that class. Either a "class" stamp can be used, or denominated stamps to the value of the postage. "Class" stamps remain valid for the stated class even after price increases.