this one here, looks like a worn die, that D could be a RPM, but coins really beat up, heres a site for RPM, but know photos to look at http://www.varietyvista.com/Variety Master Listings/jefferson rpms 1956-1984.htm#_1964-D
It looks like it took a hit. The New Orleans mint hasn't minted a coin since 1909 and they never minted nickels