These small symbols, stamped onto the surface of these classic American coins, indicate the specific United States Mint facility where each coin was produced. For example, an “O” signifies the New Orleans Mint, while a “CC” denotes the Carson City Mint. Their presence, absence, and specific characteristics are key differentiating factors.
They are crucial for collectors as they directly impact a coin’s rarity and, consequently, its value. Certain mints produced fewer coins, making examples bearing those marks more desirable and expensive. They also provide valuable historical context, linking a specific coin to a particular period and location in American history.