1974 was the last year the San Francisco Mint issued Lincoln cents for general circulation.
Philadelphia
The Royal Mint advises that 469,207,800 British Pennies were minted in 2009.
Since 1968 San Francisco has struck proof coins, including cents, that all carry the "S" mint mark. However they no longer make coins for circulation. San Francisco struck pennies nearly every year from 1908 to 1955. The mint was deactivated from 1956 to 1964. In 1965 it started producing circulation coins and Special Mint Sets during the great coin shortage but none of these carried a mint mark. The S mint mark was returned to circulating cents minted from 1968 to 1974, but those were the last ones minted up to the present.
In 1942, At the Philadelphia mint there were 657,828,600 minted for circulation, and 32,600 proof pennies minted. At the Denver mint there were 206,698,000 minted. At the San Francisco mint there were 85,590,000 minted.
They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
If you're referring to U.S. pennies, the mint mark is located just below the date, just as it's been since the Lincoln cent was introduced in 1909.
No - there are three types ... 392,021,000 with no mint mark 57,154,000 with D mint mark 57,154,000 with S mint mark for 1919 USA 1 Cent. The mint mark (if present) is below the date.
No mint mark coins are produced at the Philadelphia,PA
Coins made at the Philadelphia mint did not have mint marks until the 1980s. Your coin was made at the Philadelphia mint.
Any Lincoln cent that does not have a mintmark was struck at the Philadelphia Mint
Pennies both historic and modern do not have a mintmark for coins minted at the Philadelphia mint.
If there is no mint mark the coin was made at the Philadelphia mint. It was not until 1979 that the "P" appeared on the penny. "P" mintmarks have NEVER been used on pennies.