The 1991 Denver 5-cent nickels, also known as Jefferson nickels, are a part of the series minted in the United States since 1938. The design features a portrait of Thomas Jefferson on the obverse and Monticello on the reverse. Roll quantities typically contain 50 coins, making them accessible for both collectors and investors. While circulation coins, such as those from 1991, are generally more common, higher-grade specimens can attract interest due to their condition and potential numismatic value.