The United States one-cent coin is a unit of currency equaling one-hundredth of a United States dollar. Its symbol is: ¢. Its obverse has featured the profile of President Abraham Lincoln since 1909, the centennial of his birth. Since 1959 (the sesquicentennial of Lincoln's birth), the reverse has featured the Lincoln Memorial. The coin is .75 inches (19.05 mm) in diameter and .061 inches (1.55 mm) in thickness. The one-cent coin is often called a penny, but the U.S. Mint's official name for this coin is cent. In 1943, at the peak of World War II, cents of zinc-coated steel were made for a short time due to war demands for copper. A few copper cents from 1943 were produced from the 1942 planchets remaining in the bins. Similarly, some 1944 steel cents have been confirmed. From 1944 through 1946, salvaged ammunition shells made their way into the minting process, and it was not uncommon to see coins featuring streaks of brass or having a considerably darker finish than other issues....