Collectible coins encompass various types, including historical and commemorative pieces, bullion coins, and numismatic items. In the United States, collectible coins include those that represent regional and private issues predating 1776, showcasing a rich diversity in design and minting practices. Notable examples include coins from the colonial period and the early years of American independence. The year 1688 is significant in the context of early American currency as it corresponds to types of coins and issues related to trade and commerce before the establishment of the U.S. Mint. Four-dollar coins, such as the unique "four dollar" denomination issued in specific cases, are also a part of the complex numismatic landscape.

Item Denomination Series Year Mint
United States of America 1688 N/A Pre-1776 Private and Regional Issues $4 $4 (Four Dollars) Pre-1776 Private and Regional Issues 1688 N/A