Key Date Coins https://validator.w3.org/feed/docs/rss2.html 1876-CC Twenty Cent Piece 1878-S Seated Liberty Half Dollar 1870-S Three Dollar Gold Piece 1915 Panama Pacific $50 Gold Piece 1921 Peace Silver Dollar 1796 Draped Bust Quarter 1880 Shield Nickel 1854-O Liberty Double Eagle 1856-O Liberty Double Eagle 1870-CC Liberty Double Eagle 1907 Saint Gaudens Double Eagle 1927-D Saint Gaudens Double Eagle 1969-S Doubled Die Lincoln Cent 1922 “No D” Lincoln Cent 1943 Lincoln Cent 1883 Liberty Nickel 1937-D 3 Legged Buffalo Nickel 1792 Half Disme 1932-D & S Washington Quarter 1933 Saint Gaudens Double Eagle 1870-S Seated Liberty Half Dime 1921 Walking Liberty Half Dollar 1794 Flowing Hair Silver Dollar 1849 Liberty Double Eagle 1995-W Proof American Silver Eagle 1822 Capped Bust Half Eagle 1955 Doubled Die Lincoln Cent 1894-S Barber Dime 1964 Kennedy Half Dollar 1856 Flying Eagle Cent 1877 Indian Head Cent 1893-S Morgan Silver Dollar 1909-S VDB Lincoln Cent 1916 Standing Liberty Quarter 1895 Proof Morgan Silver Dollar 1885 Liberty Nickel 1913 Liberty Nickel 1916-D Mercury Dime 1901-S Barber Quarter 1802 Draped Bust Half Dime 1964 Peace Silver Dollar 1793 Chain Cent 1928 Peace Dollar 1804 Draped Bust Silver Dollar Guide to Key Date U.S. Coins