Awesome sheet JB.
100 of the 1935E $1 Silver Certificate 18-subject sheets were distributed with blocks N-G, R-G, U-G and X-G. The SSG (10th Edition) has them listed as valued at $1,300 in CCU and $1,750 in Gem. I had a chance early in my collecting days to purchase an ungraded sheet for $600, and passed on the deal. Regret it to this day.