I have just now taken over the #1 position in the 1943 from my most-worthy competitor Chancey MS60+.
I was able to do so by upgrading my 1943-D Steelie from the grade of NGC MS67+ CAC to a full NGC MS68
My1943-D and 1943-S quarters have been upgraded from NGC MS67 to NGC MS67 CAC and NGC MS67* CAC respectively.