The most famous key date in twentieth-century American coinage is an accident of scheduling. In 1916 the Denver Mint struck dimes only briefly before its presses were redirected to other denominations, and when the year closed the count stood at 264,000, the lowest mintage of the entire series and a fraction of the 22 million Philadelphia produced. Nobody noticed at the time. The coins went to work, and they worked for decades: the typical surviving 1916-D is worn nearly smooth, saved from pocket change years later by collectors checking dates.
That is the profile of a coin that was never hoarded: valuable in every grade, scarcest in the middle grades that honest circulation produces, and the target of more counterfeiting than perhaps any American coin. The standard fraud is a genuine 1916 Philadelphia dime with a D added, and the genuine article fights back with well-documented diagnostics: only four die pairs struck the real mintage, their mintmark positions and styles are catalogued, and every major grading service knows them cold.
The 1916-D is the coin that taught generations of Americans to check their change, and it is still the first date anyone learns in this series. Two rules cover every purchase: the coin does not exist raw at a fair price, and the mintmark is where the lie lives. A worn, honest, certified example is a lifetime coin at any budget that reaches it.
| Issue | Mint | Mintage |
|---|---|---|
| 1916 Mercury Dime | Philadelphia | 22,180,080 |
| 1916-S Mercury Dime | San Francisco | 10,450,000 |
| 1916-D Mercury Dime | Denver | 264,000 |
Mintage figures: United States Mint, Annual Report of the Director of the Mint, cross-checked across independent published references. Specifications: United States Mint coin specifications.