Why the Final “S” Mintmark Proof Silver Eagle Is a Must-Have
What’s the “Final ‘S’ Proof American Silver Eagle”? In September 2025, the U.S. Mint officially released what it describes as the final “S” proof American Silver Eagle — in other words, the last proof version struck at the San Francisco Mint, bearing the “S” mintmark. So when people say “final ‘S’ proof,” they’re referring to the fact that this is expected to be the last proof American Silver Eagle minted with the “S” (San Francisco) designation under the current program. …