In 1999, the United States Mint issued a one dollar coin as part of the Modern Commemorative series, specifically minted in Philadelphia. These coins often celebrate significant events, anniversaries, or individuals in American history. The 1999 one dollar coin may represent a specific commemorative theme or occasion, contributing to its collectibility. The Modern Commemorative coins are generally struck in a clad composition or sometimes in silver, appealing to both numismatists and casual collectors.

Item Denomination Series Year Mint
1999-P $1 Dolley Madison $1 (One Dollar) $1 Modern Commems 1999 Philadelphia
1999-P $1 Dolley Madison DCAM $1 (One Dollar) $1 Modern Commems 1999 Philadelphia