1882 O/S Morgan Silver Dollar • Mint Error, Strong Overstrike • Graded CAC AU Details (Cleaned)

During the 19th century, dies were often prepared and shared between U.S. Mint facilities. The Philadelphia Mint created most of the working dies and then punched in mintmarks (O, S, CC, etc.) by hand before shipping them out.

A die intended for San Francisco (with an “S”) was re‑punched with an “O” when it was redirected for use in New Orleans. Rather than discard the partially prepared die — which was costly and time‑consuming to remake — engravers simply struck the “O” over the “S.”

The result: a visible O/S or “overstrike” mintmark visible under magnification on the reverse.