United States
40% silver clad: 11.50 g
90% silver: 12.50 g
Composition
1964, silver proofs 1992–present: 90% silver, 10% copper.
1965–1970, some 1776–1976 San Francisco-minted coins: outer layer of 80% silver, 20% copper surrounding core of 79% copper, 21% silver, totaling 60% copper, 40% silver.
Circulation strikes, 1971 to present: outer layer of 75% copper, 25% nickel surrounding core of 100% copper.
Silver Circulation strikes since 1971 contain no silver. For 90% silver issues: 0.36169 troy ounces. For 40% silver issues: 0.1479 troy oz
Years of minting 1964–present
Αυτα απο την βικιπαίδεια.
Γενικα τα "απλα" εχουν 90% μεχρι το 1964 και 40% μεχρι το 1969
αμερικανακια ..πφφ ψεκασμενοι
δεν βγαζεις ακρη με δαυτους Νικολα