If you are looking for quality scope rings, then check out CZ-USA Warne Quick Detatch Scope Rings. These rings are 1" in diameter and come in a medium height. They come in a black finish, and are designed for 19mm dovetails on the CZ 550.
Specifications and Features:
Warne Quick Detatch Scope Rings
For: 19mm dovetail on the CZ 550