I have checked both of my CZ-52s and do not see any "accuracy markings" on either barrel. I think the whole accuracy marking thing is bullsnot. The "dots" on top of the slide has been debated for years, and I can't believe that people still think they are some kind of accuracy measure. This is a military pistol, not a target gun.
Seriously, what pistol has "accuracy marks?" I can't think of any.
Jonathon- Good post about the CZ-52.