Dr. Drew-thank you for the supplementary material.

Skeettx- The last 5E Knick was engraved by Bill Mains 6/9/82, the last $grade was about the same time but I have misplaced the date. Both where in stock about 1985 isn when I got serious about doing a book.

The 7E engraving and checkering patterns did not change much over their production. I will post a 7E Knick photo when I can find it in my photofils.