Collectible coins, often referred to as numismatic coins, hold value not only for their metal content but also for their historical significance, rarity, and demand among collectors. In the United States, the one-dollar coin has been produced in various designs and series, including notable issues like the Eisenhower dollar and the Susan B. Anthony dollar. The concept of national issues dates back to 1776 when the Continental Congress authorized the production of currency, with Philadelphia being a central hub for minting operations. Collectors often seek coins from specific years or mints, which can significantly affect their valuation and desirability.