I know there are a million threads on label variations; so direct me to another one if this already exists.

I was going through my loose NES games and noticed I have a copy of DONKEY KONG CLASSICS that does not have the "Nintendo Seal of Quality" is this a normal variation? I am guessing it is, but then I have a another that has the seal on it.

Just curious if others had noticed this.

Also is there a list out there of NES label variations; because looking at all these labels is driving me bonkers. Even Bubble Bobble has a black seal of quality on one label and a white seal on another. SO CONFUSED!!

Help me out guys.