Hi; I have a 8/71 Sydney-built HQ with what I believe is the original Premier grille (silver vertical bars). It had a black and silver badge insert with some flaking of the black. I initially thought it had faded and replaced it with a Rare Sprares coloured reproduction.

Dad previously had a near-new 12/73 Sydney-built HQ which had the coloured badge. Over time the red then blue faded to opaque / clear; there was no black in the background.

I think Innuendo has confirmed my suspicions, as they are definitely painted differently.