The 1900-O/CC Morgan Silver Dollar is a rare overdate variety, featuring the “O” mintmark of the New Orleans Mint punched over remnants of the “CC” mintmark from the Carson City Mint. This fascinating numismatic anomaly resulted when unused Carson City reverse dies—after the closure of the Carson City Mint in 1899—were repurposed at New Orleans. The Philadelphia Mint partially effaced the “CC” from the dies and added an “O,” creating this distinctive hybrid mintmark. There are at least six authentic die marriages for this variety, catalogued by Morgan dollar specialists and confirmed as genuine.
In Mint State, the 1900-O/CC Morgan exhibits the strong strike, vivid luster, and classic George T. Morgan design features—a left-facing Liberty on the obverse and an eagle with outstretched wings on the reverse. The telltale clue is the overlapping O/CC mintmark beneath the wreath. Examples in MS63 or better are scarce and among the most desirable, with auction prices increasing steeply in higher grades and visually sharp examples. MS63 to MS64 pieces typically boast only minor contact marks with brilliant surfaces and good eye appeal.
While up to 10% of the 12.5 million 1900 New Orleans Morgan dollars may have originally carried the O/CC mintmark, attrition through circulation, melting, and damage has rendered high-grade survivors elusive and especially prized by variety specialists. Recent auction results for top-grade pieces consistently reach several thousand dollars, and ultra-gem specimens with outstanding strike and luster are museum-level rarities.
Care must be taken to verify authenticity, as counterfeits and altered mintmarks do exist. However, genuine 1900-O/CC Morgan dollars are catalogued and widely collected, and certified examples from reputable grading services are safest for acquisition.
In summary, the 1900-O/CC Morgan Silver Dollar is a rare, visually compelling overmintmark variety deeply sought by Morgan dollar collectors, representing a unique bridge between two storied U.S. mints in Mint State condition.