Collectible coins, particularly the United States one-dollar coins, often include various types such as regular issues, commemoratives, and patterns. Patterns are experimental designs or prototypes struck to test artistic concepts or production techniques before final approval. The 1868 one-dollar patterns from Philadelphia are notable for featuring unique designs that did not go into mass production, making them highly sought after by collectors due to their rarity and historical significance.

Item Denomination Series Year Mint
1868 P$1 Aluminum J-652 $1 (One Dollar) Patterns 1868 Philadelphia
1868 PG$1 Aluminum J-653 $1 (One Dollar) Patterns 1868 Philadelphia