This 1979 D Jefferson Nickel is a rare find with a unique error - a filled D mint mark. The coin is made of copper and nickel, and is considered uncirculated. It features a business strike type and was minted in Denver. Although ungraded and uncertified, this nickel is a valuable addition to any coin collection. The coin's denomination is 5C and it is colored silver. In addition to its error, this nickel has no other condition issues.