what was the first year they put copper in quarters
Non-clad silver quarters weigh 6.25 grams and are composed of 90% silver, 10% copper, with a total silver weight of 0.1808479 troy ounce pure silver. They were issued from 1932 through 1964. The current rarities for the Washington Quarter silver series are: Branch Mintmarks are D = Denver, S = San Francisco.