Postage for a first class letter in the US was never 7 cents. It jumped from 6 cents to 8 cents on May 16, 1971.
The first time postage went up was November 3, 1917 during the war. In August 1, 1958 postage went up from 3 cents to 4 cents, on January 7, 1963 from 4 cents to 5 cents, on January 7, 1968 from 5 cents to 6 cents, May 16, 1971 from 6 cents to 8 cents. Postage continued to go up approximately every other year. The last increase was January 27, 2013 from 45 cents to 46 cents.
{| |- | First Class postage in 1975 was 10 cents for the first ounce. This rate was valid through December 31st of that year. At that point it went up to 13 cents. |}
In 1955 and up until 7/31/58, first class postage in the US was 3 cents.
Fourty two cents.
The price of a First Class Stamp in 2000 was 33 cents. It was good for one ounce of First Class Postage. It went up from 32 cents in 1995.
In 1950 until 7/31/58, first class postage was 3 cents.
The rate went to five cents on January 7, 1963. It was valid for 5 years.
It 44 cents per ounce. Ten or less is 88 cents
In 1944 up until 7/31/58, the first class postage rate in the US was 3 cents.
thirty-two cents
It became 34 cents on 7 January 2001.
In the U.S. the first ounce for letters was 29 cents (23 cents for each additional ounce)and postcards were 19 cents.