Catalogued as DeWitt/Sullivan GMcC-1864-25, this is one of the finest specimens I have personally seen. It actually took me a while to nail this one down as I wasn't sure if there was a separate variety for this reverse. After some digging, and asking a few questions online (great community over at the PCGS forums by the way) I'm comfortable that this is a known, though significantly more scarce reverse of GMcC-1864-25.