The Three Cent coins, minted in the United States from 1851 to 1889, were introduced to facilitate trade and reflect the rising costs of goods. Notable varieties include the silver three cent piece and the copper-nickel version. Patterns and trial coins from 1851 are significant in numismatics, often created to test designs before minting regular issues. These pieces can be rare and sought after by collectors, with some examples bearing unique features indicative of their trial status.