Collectible coins can encompass a wide range of types, including patterns, which are test strikes made to evaluate designs before official production. The 1864 pattern coins from Philadelphia are notable examples, as they represent experimental designs for the One Dollar denomination. These patterns are sought after by collectors due to their historical significance and limited availability, often commanding high premiums in the market. The United States Mint typically produced a limited number of these patterns, making them rare and valuable within the numismatic community.

Item Denomination Series Year Mint
1864 P$1 Silver J-396 $1 (One Dollar) Patterns 1864 Philadelphia