67 Camaro Bumper Guards

[Denis]

Does anyone know the original finish (i.e. chrome, white/gold cad, stainless, zinc, gray phosphate, black oxide) used on the highlighted parts shown below? This is for the hardware that's used to attach the large front and rear bumper guards respectively on a 67 Camaro. Maybe someone has a nice NOS set they could check? Thanks in advance.

Front:

http://www.67z28.net/images/FtGuard.jpg

Rear:

http://www.67z28.net/images/RrGuard.jpg