You are correct, Mark. This is N4279, the variation with 3 Gray inserts. N1423 is the same chip except that it has 3 Cream inserts. I don't like to disagree with my partner Michael. He may not be aware of this variation.

These chips were used during Marty Kuzen's ownership. Mark was also correct in noting that Marty Kuzen is not written on the chip, as evidenced by the lack of quotes in the description.