Jefferson NickelsPre-War Composition (1938-2003)Designer – Engraver: Felix Schlag Metal Composition: 75% Copper – 25% NickelDiameter: 21.2 mm Mass / Weight: 5 gramsWartime Composition (1942-1945)Designer – Engraver: Felix Schlag Metal Composition: 56% Copper – 35% Silver – 9% ManganeseDiameter: 21.2 mm Mass / Weight: 5 grams