CP, NGG real screened glass. SC is a clear glass, but also has a translite behind the rear panel with the artwork.
CV is screened on a thick plastic as a backglass. Not a translite
Also, if you go to last few system 11’s BK2K is also a real, Screened, mirrored backglass.
I think the above would be the last games Bally/Williams shipped with real glass, or screened back without translite. All the rest are translite.