Cz 452, 455, 457, 512 Steel 1" Rings

Cz brand integrated base and ring set for 11mm dovetails. These came with a gun I bought, but I had a different set of rings I wanted to put on.

I don't know much about the rings themselves, and the only similar ones I found in Canada were $170 at Bullseye North (for 30mm). I'm guessing they are medium height? They'd fit a 44mm scope on a CZ easily.

There are a couple screws that seemed harder to thread out, so I've priced them accordingly. Asking $65 plus $20 shipping.