
Hey there! That's a fantastic question that many people who are new to coin collecting or silver stacking wonder about.
Based on the information provided, the amount of silver in a quarter is determined by its mint year rather than the specific design on the coin. Any United States quarter minted in 1964 or earlier is the one you're looking for, as these coins are all composed of 90% silver.
This 90% silver content applies to several different designs, including the Barber, the Standing Liberty, and the Washington quarters, as long as they are dated 1964 or before. Since these different types of quarters were minted to the same weight and composition standard, they all contain the same amount of silver. So, a 1964 Washington quarter has the same silver content as a 1928 Standing Liberty quarter.
After 1964, the U.S. Mint stopped using silver for general circulation quarters. There were some special Bicentennial quarters made for collectors that contained 40% silver, but these have significantly less silver than their pre-1965 counterparts. So, to find the quarter with the most silver, your best bet is to check the date and look for anything from 1964 or earlier


