Even in mint state, (with the exception of very high grades like MS-67+ as graded by a reputable grading company) the coin isn't worth much more than the silver content, which at the time of writing is about $5.58. You might be able to get some more money if you shop around or sell it to collectors, but the more recent silver coins were produced in massive amounts with the 1964 year easily having the highest mintage of all silver quarters produced, and as such, it isn't a very desirable coin except for silver content.
1964 is the most common silver Washington quarter, it's worth about $3.00
The mint mark on Washington quarters dated 1932-1964 is on the reverse (tails) side below the eagle.
U.S. quarters, starting from 1932, are called "Washington quarters." Washington quarters dated from 1932 to 1964 are made with 90% silver and 10% copper, and weigh 6.25 grams. The value of the metals depends on the market price of silver and copper. As of October 5, 2007, the value of the silver in a pre-1964 Washington quarter is $2.41 (market price of silver $13.39 per ounce) and the value of the copper in a pre-1964 Washington quarter is about a half of a cent, giving the total value of a pre-1964 Washington quarter about $2.42. If the coin is rare, and/or is in mint like condition, it could be worth significantly more. None of the 1944 Washington quarters (Philadelphia, San Francisco, and Denver mints) are rare, but if the coin is in mint state, it would be worth about $35.
A 1934 Washington Quarter in good condition (G4) is worth: $3.50. If its mint state is MS60, the value rises to: $$45.
All Washington quarters dated 1932 to 1964 had the mint mark on the back under the bow of the wreath. No mint mark = Philadelphia D = Denver S = San Francisco (up to 1954)
If there is no mintmark under the eagle on a quarter then the coin was minted at the Philadelphia Mint. That's the only mintmark position for Washington quarters dated 1964 and earlier. The mintmark was first put on the front of the coin in 1968.
Helen Keller was pictured on the reverse. George Washington, as with all of the state quarters, was on the obverse.
The mint mark on all Washington quarters dated from 1932 to 1964 is on the back side above the "R" in the word Quarter. No mint mark = Philadelphia S = San Francisco D = DenverOther datesQuarters dated 1965-67 don't have mint marks. Starting in 1968 the mint mark was moved to the right of the tail of Washington's wig, and in 1980 Philadelphia coins started using a P mint mark.
Denver, Colorado, the location of the mint at which it was produced.
The mint mark that you will find on the 1961 Washington quarter is the letter "D" and it is located on the reverse side of the coin just above the letters "ER" in the word "QUARTER". These coins were minted in Denver, Colorado. The 1961 Washington quarter was also minted in Philadelphia, Pennsylvania but in 1961 Philadelphia was not putting a mint mark on the coins produced there.
The value is only for the silver about $3.25
This coin is common and runs from $3.75- $4.25 in circulated condition and only $4.50 in Mint state