Collectible coins include various types such as currency, patterns, and trial coins. In the United States, the 25-cent quarter is a prominent denomination, with numerous issues sought after by collectors. The 1965 trial coins are particularly notable, as they were created for experimentation purposes before the introduction of the clad coinage, which shifted away from silver content. These trial pieces are highly valued among numismatists for their historical significance and limited production.

Item Denomination Series Year Mint
1965-- (Unknown) Patterns & Trial Coins 25¢ (Twenty Five Cents, Quarter) Patterns & Trial Coins 1965 Unknown