“ D” mintmark – Denver, Colorado; this is the second “D” mintmark, which would not first be seen until 1906. “ O” mintmark – New Orleans, Louisiana; this mintmark is seen on gold and silver coins from 1838 through 1861; after the Civil War, the “O” mintmark would appear on silver and gold coins made from 1879 through 1909.
Where does the P come from on a nickel?
“ P” mintmark – Philadelphia, Pennsylvania; the mint has been officially striking coins since 1793, but its “P” mintmark would not debut until 1942, when it was first seen on the Jefferson wartime nickels – some of which had “P” mintmarks until 1945.
