I agree Bill. Probably was at least quite a bit of minor variation. Probably depended on who was taping things off, their experience level, etc.
There is another way I have seen, can’t say for sure if it was on a 67, but it had blackout farther up into the trunk weatherstrip channel.
Don’t mean to open up an old can of worms, but I am in the camp of not full gloss in the blackout in 67 and 68. I am not as sure for 69, there was probably variation that year.