The mint mark on a 1936 Walking Liberty half dollar is located on the reverse [tails] side of the coin in the little "valley" just to the left of the word "HALF" near the edge of the rim.
There were no dollar coins minted between 1936 and 1970 inclusive. Please check your coin again, you probably have a HALF dollar.
The mint mark on a Barber Half Dollar is located on the reverse side right under the tail of the eagle.
A coin in average circulated condition has a retail value of $18.00.
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 mint mark on Franklin half dollars is on the reverse side, just above the Liberty Bell.
The first Half dollar with any mint mark was from the New Orleans Mint in 1838.The mint mark is on the reverse under the eagle
In average condition a 1936 Walking Liberty half dollar is valued at $18.00.
There were no dollar coins minted between 1936 and 1970 inclusive. Please check your coin again, you probably have a HALF dollar.
The mint mark on a Barber Half Dollar is located on the reverse side right under the tail of the eagle.
The mint mark is on the reverse of the coin between the tail and the D in the word dollar.
No mint mark indicates that the coin was minted in Philadelphia.
Look on the back for a mint mark at roughly the 8:00 position. Current (09/2008) prices from Numismedia for an MS-60 half are No mint mark letter : $42 "D" : $82 "S" : $130
A coin in average circulated condition has a retail value of $18.00.
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 mint mark on Franklin half dollars is on the reverse side, just above the Liberty Bell.
No, 234,308,000 were struck at the Philadelphia Mint and will not have mintmarks.
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"