The mint mark (if it has one) is on the reverse, along the rim, at about 7 o'clock, just to the right of the "E" in ONE. It's in the same place on all years of Mercury dimes.
Possible mint marks are:
(none) = Philadelphia
D = Denver
S = San Francisco
If there is a mint mark it will be a small "O" (New Orleans) below the word DIME and above the wreath on the back of the coin. If there's no mint mark the coin was struck in Philadelphia; dimes didn't carry a "P" mint mark until 1980. Please see the Related Question for more information.
In 1961 the mint mark position was on the back of the coin next to the base of the torch. No mint mark = Philadelphia; D = Denver What you're interpreting as "US" on the front is actually JS, the monogram of the designer John Sinnock.
The 1965 dime is a Roosevelt dime. This dime does not carry a mint mark and there were 1,652, 140,000 of them minted in the U.S. They have a value of between 10 cents and 2 dollars.
JS isn't the mint mark, but rather the initials of John R. Sinnock, Chief Engraver of the U.S. Mint. A 1950s dime will have a D for Denver, S for San Francisco, or no mint mark for Philadelphia (a P mark wasn't added until the 1980s). 1956 is a common date, currently worth about $2 for the silver.
10 cents, they are in common circulation, prior to the 1980s dimes struck at the Philadelphia mint had no mintmark.
If it has a mintmark it can only be an "O" on the reverse of the coin.
If there is a mint mark it will be a small "O" (New Orleans) below the word DIME and above the wreath on the back of the coin. If there's no mint mark the coin was struck in Philadelphia; dimes didn't carry a "P" mint mark until 1980. Please see the Related Question for more information.
In 1961 the mint mark position was on the back of the coin next to the base of the torch. No mint mark = Philadelphia; D = Denver What you're interpreting as "US" on the front is actually JS, the monogram of the designer John Sinnock.
The 1965 dime is a Roosevelt dime. This dime does not carry a mint mark and there were 1,652, 140,000 of them minted in the U.S. They have a value of between 10 cents and 2 dollars.
JS isn't the mint mark, but rather the initials of John R. Sinnock, Chief Engraver of the U.S. Mint. A 1950s dime will have a D for Denver, S for San Francisco, or no mint mark for Philadelphia (a P mark wasn't added until the 1980s). 1956 is a common date, currently worth about $2 for the silver.
10 cents, they are in common circulation, prior to the 1980s dimes struck at the Philadelphia mint had no mintmark.
Ten cents It's a common circulation coin. 568,760,000 were minted at Philadelphia (no mint mark) and 695,222,774 were minted at Denver (D mint mark)
The only US coins to carry a C mintmark were gold coins struck at the Charlotte Mint from 1838 to 1861. The mint mark position on a 1950 dime is on the back at the bottom of the torch: No mint mark = Philadelphia D = Denver S = San Francisco There's more information at the Related Question.
The coin is so common most are valued for the silver only, about $1.00
The mint mark position is to the right of Monticello.No mint mark = PhiladelphiaD = DenverS = San FranciscoSpecial wartime nickels had the mint mark above the dome of Monticello. The position was moved again in 1968, near the date. In 1980 Philadelphia began using a P mint mark.
The mint mark on a 1941 US dime would be located on the reverse [tails] side of the coin just to the right of the letter "E" in the word "ONE". If the crown you asked about is on the obverse [heads] side of the coin just above and slightly to the right of the date, what you are seeing are the initials "AW" for the designer of the coin , Adolph A. Weinman. Wear on the dies used to make the coin sometimes gives this the appearance of a crown.
The Mecury dime , as all coins, depends on condition . Please tell us that , the year and Mint mark for proper valuation and resubmit the question.