The 1942-D nickel from the United States, specifically from the Denver Mint, is part of the Jefferson nickel series, which was first issued in 1938. During World War II, specific nickel compositions were altered, and the 1942-D nickel is notable for being one of the last examples produced with a nickel alloy before the introduction of wartime substitutes. Coins from this year can be collected in various grades, with uncirculated specimens fetching higher prices among collectors. The 5c roll typically refers to a roll of 40 nickels, which may include various dates and mintmarks, including the sought-after 1942-D.