I don't know if this will help you, but I have an exact copy of that sight made by "MENDOZA" of Mexico. Its mounted on a "Crosman" RM577 .177 air rifle....very nice sturdy, easily adjusted sight! :right:
__________________ U.S. Army
1976-1979
237th Combat Engineers
Heilbronn, Germany
The CZ 452 is fitted with high see through scope mounts, Giving 2.12 Inches from center of scope to center of bore. I wonder would the peep sight fit between the scope eyepiece and the receiver. That would be realy neat.