The "silver topped" lid started in 66, and went to partway thru 68 model year. None of those had a button. My 69 cuda had woodgrain top and I don't believe it had button.
As for the "chop" that was for dealer installed ac, NOT factory ac. Our 67 cuda has factory air with full console and full diffusers.
Nobody has been able to definitively say that the chopped/hacked console was for dealer ac.
It wasn't there for factory AC for sure. Well for 67 anyway lol