If there isn't a mint mark on a US coin, usually it means that such a coin was minted in Philadelphia.
No mint mark indicates that the coin was minted in Philadelphia.
The mint mark by itself isn't worth much. It has to be on a coin. If you do have a 2001 coin with a D mint mark, it's far too new to have any special value unless it's a high-quality uncirculated coin.
It was minted in philadelphia
MS stands for Mint State and 65 is the grade given to the coin. There are several grading levels for a regular strike coin, Mint state being the best with MS grades ranging from 60 to 70 (70 being a flawless coin). You may also see a coin marked PF 65 which simply means the coin was a specially longed proof coin, double struck with a special dye by the mint for collectible purposes.
Check that coin again. Mint marks were on all quarters by 1981.
The letters are called Mintmark's NOT mint stamps. They are used to identify which mint the coin was made at.
The US mint did not use mint marks on the 1965 half dollar coin.
The "S" is a mint mark not a stamp, but the value is $2.00-$3.00 for circulated coins and a mint state coin is $7.00
The mint mark is located in different places depending upon the coin and the date it was minted.
The mintmark (if it has one) is on the reverse under the eagle.
The lack of a mint mark (not "stamp", btw) indicates your coin was struck in Philadelphia. Its current retail value is about $3.25, mostly due to its silver content.
The coin has been altered and has no collectible value. This is not an Mint error.
if its does not have a mint stamp it was minted in philly
The mintmark (if any) will be found under the 2 in "2002" on the front of your coin. Keep in mind that your coin may bear no mintmark.
The letters are actually called mint marks rather than "stamps". They indicate which mint struck the coin. Philadelphia didn't put a P mint mark on quarters until 1980, so any coin with that mint mark is recent and quite common. Unless your coin is in gem uncirculated condition it would have no extra value.
It's called a mintmark not a stamp and the coin is face value, the use of the "P" mintmark did not start until 1980 on the half dollars.
It's a common novelty coin, not worth very much. A 1973 penny is currently worth about 2 cents for its copper content, and one with Kennedy carved into is worth as much as someone on eBay will pay for it.