If you have a Denver minted coin it will have the mintmark D. The location of the mintmark will depend on the date.
Not being certain which half dollar you have, I can tell you that there was never an "A" or a "N" mint mark. The letters you should find will be a "D", an "S", an "O", a "P" or a "CC"
The mint mark is on the reverse of the coin between the tail and the D in the word dollar.
The 1920 Half Dollar - aka - Liberty Walking - mint mark of "D" or "S" would be located on the reverse side, just to the left and above the "H" in half dollar.
The letter D is the mint mark so it can't both have a mint mark and not have a mint mark.Please see the related question for more information.
it's worth about $8 to $10 circulated,and with a D mint is $12.Uncirculated is about $15, and with a D mint is around $20.
For the year 1853 most all Quarter Eagles were struck at the Philadelphia mint, so they have no mintmark. A few were made at the Denver mint and will have a "D" mintmark.
The letter D is the mint mark so it can't both have a mint mark and not have a mint mark.Please see the related question for more information.
It's just a common date half dollar that's still found on circulation, spend it.
Need to know if mint mark is on the front or back of coin
The "P" Mint mark was not used on half dollars until 1980, it's only a half dollar so spend it.
If the coin has any wear the value is for the silver, about $8.50
That's half DOLLAR, just like it's spelled on the coin. Also there could not be a D mint mark half from 1896 because the Denver Mint didn't open until 1906. See the Related Question for more information about values and mint marks.