Collectible coins include a variety of types, such as circulation coins, commemoratives, bullion, and patterns. In the United States, the one-dollar coin has a rich history, with notable issues like the 1878 patterns produced in Philadelphia. These patterns were experimental strikes intended to test designs or compositions for future coinage but were never officially released for circulation, making them highly sought after by collectors. The rarity and unique characteristics of these coins contribute to their significance in numismatic collections.

Item Denomination Series Year Mint
1878 P$1 Silver J-1550 $1 (One Dollar) Patterns 1878 Philadelphia