coins \ Coin \ United States of America \ \ Patterns \ 1858 \ Philadelphia
Collectible coins are typically classified into various types based on their historical significance, rarity, and condition. One notable category is patterns, which are coins created to test designs or compositions before mass production. The 1858 Philadelphia patterns are especially significant as they were struck as prototypes for potential issues; these coins often feature unique designs that differ from regular issues and are highly sought after by collectors. The 1858 patterns can provide insights into the design evolution of U.S. coinage during that era.