Now that I look at pictures and catalogs, I think you are right.... Paul has a wrong TCR number for the light blue/blue HS. It should be N1790.

I have thought for quite a while that TCR has their value codes mixed up on N1790 and N4764. You see many more of the light blue chips than you do of the first-issue blue with gold hot stamp which JamesC has as a $60 chip. You may want to review this, Allan.