I'm old enough that it was stamped on my first car's sill.
But that's basically inside, you don't see that without opening the door. I would't call that "badging" in the proper sense.
Same with the GM "Mark of Excellence". The "GM Mark of Excellence" sticker was used even later than 1972, into at least the 80's. It's possible that GM used a sticker even later than that in occasional cases?
P.S. Ironically the "Mark of Excellence" tag line on those stickers got explicitly called out by the National Advertising Review Board.
From nytimes article from 2009 we have
"G.M. apparently no longer thinks so. So it is removing the “G.M. Mark of Excellence” logos from all its Chevrolet, Buick, Cadillac and GMC models. The logo had been a fixture on all G.M. vehicles since 2005."