Not sure which specific model you are referring to so it is not possible for me to look it up, but the 457 line as a whole is the latest/new version of the 452 and 455 lines.

Ger, Yes it is Sir. It was released mid year this year (2019).

yes it is a brand new model article dated 20 june 2019 "CZ 457: A rimfire Lux-ury
The CZ 457, introduced just this year by CZ and CZ-USA, has big shoes to fill. It’s predecessors, the 455 and 452 series rimfires, were well made and generally well liked. The “Lux” line of CZ rimfires represent a rifle with a touch of elegance. They are distinguished by their checkered Monte Carlo shaped Turkish walnut stocks and adjustable iron sights. CZ was kind enough to afford TFB the opportunity to try this new rifle out in a .22WMR chambering." thefirearmblog.com/blog/2019/06/20/tfb-review-cz-457-lux-22wmr/