Sorry, the "Reversed" term was mine. The FAQ's say:
"1967 - Argent Silver outer, with a Black center.
1968 - Charcoal outer, with Argent Silver center."

I can see how the 68's outer part has a little darker shade of silver on yours. I never paid attention on other pictures.

I've always liked a totally black grille on most cars. Guess I need to decide how correct I should make it!