The 1909 S Over Horizontal S (S/S) Lincoln Wheat Cent is a rare Repunched Mintmark error. The "S" mint mark is stamped on top of a subtle horizontally aligned "S". One way to identify this is to notice a small portion of the under-stamped "S" sticking out from the right side and slightly above the primary "S" mintmark. Mintage of the 1909 S Cent - 1,825,000