Collectible coins, particularly those from the United States, encompass a wide range of types including historical pieces, commemoratives, and patterns. Trial coins, also known as patterns, are experimental pieces struck to test design or production techniques before official coinage. An example from 1857 produced in Philadelphia features unique designs that differ from standard currency, making them highly sought after by collectors and numismatists due to their rarity and historical significance. These types attract interest not only for their monetary value but also for their connection to American history and craftsmanship.

Item Denomination Series Year Mint
1857-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1857 Philadelphia
1857-P (Philadelphia) Patterns & Trial Coins Other / Varied Patterns & Trial Coins 1857 Philadelphia