I really do get a little cross when I find '64 nickels. One time, I found a 1953 P nickel in change, no lie.
I find pre-1960 nickels all the time. Sometimes as old as 1940. Nickels are one of the first coins I ever collected.
The coin that makes me mad is the 1965 quarter. I find them ALL the time and they usually look old. They're the bane of my existence. Only one year off. So close...