It is worth .25¢ The absence of a mint mark simply means it was minted at Philadelphia.
No U.S. coins dated 1966 have a mint mark. The '66 quarter is worth 25 cents.
No mint mark means it was minted in Philadelphia. The quarter is worth exactly 25 cents.
25 cents, no U.S. coin dated 1965, 1966 or 1967 has any mintmarks.
This date regardless of mint mark is valued for the silver and is worth about $3.25
The coin is 25 cents, the "P" mint mark was not used on US quarters until 1980
No U.S. coins dated 1966 have a mint mark. The '66 quarter is worth 25 cents.
No mint mark means it was minted in Philadelphia. The quarter is worth exactly 25 cents.
25 cents, no U.S. coin dated 1965, 1966 or 1967 has any mintmarks.
If you got in change spend it, in 1968 the only mint marks used were D & S a coin without a mint mark was struck in Philadelphia.
25 cents. Quarters made in Philadelphia didn't start using the P mint mark until 1980.
This date regardless of mint mark is valued for the silver and is worth about $3.25
It's worth 25 cents.
SIMPLE ANSWER: No US coin dated 1965, 1966 or 1967 will have a mintmark, it's just a penny.
Not enough info what condition is it in and what mint mark
25 cents.
1964 is the most common silver Washington quarter, it's worth about $3.00
Melt? $5.80. Depending on mint mark and condition it might be worth more.