Jefferson Nickel, Silver Wartime Alloy (1942-1945)

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The so-called "wartime" alloy represents a World War II measure to eliminate the use of nickel, a strategic material, in coinage. The former composition of 0.75 part copper and 0.25 nickel was changed to 0.56 part copper, 0.35 part silver, and 0.9 part manganese.

To differentiate the new alloy and to aid in later redemption and sorting by metallic content of these pieces by the Treasury Department, the wartime pieces were made with a large mintmark above the dome of Monticello. The Philadelphia Mint, which had never more