Where is the mint marking on a 1943 wheat penny?

The mint mark on the 1943 Lincoln Wheat Cent, and on all wheat cents, is located on the obverse (heads) side of the coin just below the date. The mark "D" represents the U.S. Mint at Denver, Colorado, the mark "S" represents the U.S. Mint at San Francisco, California, and if there is no mint mark under the date then the coin was minted at the U.S. Mint at Philadelphia, Pennsylvania.