Located on the obverse beneath Eisenhower's bust. Coins struck in 19 bear double date '1776–1976'ĭ, S. Circulation strikes: outer layers of 75.0% copper 25.0% nickel clad with a core of 100% copper (in all 91.67% copper, 8.33% nickel).įor silver clad: Outer layers of 80% silver with a center of 20.9% silver.