Where were Morgan dollars minted?

Morgan dollars were struck at the following mints during the years shown. Look on the back above the DO in DOLLAR.

Philadelphia - no mint mark, 1878-1904 and 1921

San Francisco - "S", 1878-1904 and 1921

New Orleans - "O", 1879-1904

Carson City - "CC", 1878-1893

Denver - "D", 1921 only