Did sony stop putting the ring of playstation logos on the undersides of discs with later games?

[Verm3]

I don't know if someone could answer this. Did Sony stop putting the ring of playstation 'P' logos on the outer edges of the undersides of discs with later games?

I ask because I purchased a sealed copy of Twisted Metal Extra twisted edition and it lacks these? Though it does have 'playstation 2' written on the inner ring.

[Verm3]

Ok, I've had another look at the disc and the ring of playstation logos was there all along, just they were extremely faint. Sorry.