69/70 Grill Differences

[IronCanine]

That is really helpful. Thanks for these pics. I would assume they are genuine GM. Especially the 1970 one.

It seems reasonable to me that:

1)The original 69 grill inserts could have been monochromatic (all silver)
2)Later, GM replacements were all made from the same mold (with 1970 style notches)but painted as pictured above according to YM desired
3)A Repro manufacturer just copied one of these later two tone replacement GM parts-omitting one of the notches
4)The stamping on the outer grill "bar" and the "blocked off" style paint lateral to the parking lights was the later version and carried on in the parts supply