I have a 453 which is of course a 452 with a better trigger. I have Millet Angle Loc steel rings on mine and they work great. They're far cheaper than the specialized size rings sold by CZ and they work as well as any rings could work.
I have the Burris .22 Signature Zee rings on mine and they work perfectly. The clamp flips for 11mm or 3/8" rails and it fits the 452 American rails much better than the Warne .22 rings I tried.