The 1928-S Mercury Dime was struck at the San Francisco Mint with a recorded mintage of 7,400,000 coins — the 23rd-lowest of the 77 circulation-strike issues in the mercury dime series, and 24% of the 31,041,000 mercury dimes the Mint produced across all facilities in 1928.
A full collector's note for this issue — survival, strike character, and what to check before buying — is on the writing schedule; the figures above are the permanent record.
| Issue | Mint | Mintage |
|---|---|---|
| 1928 Mercury Dime | Philadelphia | 19,480,000 |
| 1928-S Mercury Dime | San Francisco | 7,400,000 |
| 1928-D Mercury Dime | Denver | 4,161,000 |
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.