One of the Nation’s greatest strengths is its entrepreneurial spirit and the remarkable innovation and discovery it unleashes. The design also includes a privy mark of a stylized gear, representing industry and innovation. The edge-incused inscriptions are “Year, ” “S” mint mark, and E PLURIBUS UNUM. 6% Zinc, 3.5% Manganese, 2% Nickel, Balance Copper. 1.043 inches (26.49 mm). Mint and Mint Mark. San Francisco – S.