It's all about finding one of the rarest coins in good condition. Liberty seated dollars are an interesting ... minted for three years, 1979-1981 (with a random single-year 1999 series thrown in), ...
What Makes A 1974 Half Dollar ... 1979, coins manufactured at the Philadelphia mint lacked a mintmark with a few exceptions. Mint markings were only used on coins made at branch mints such as San ...