I thought I had seen them all but that is the first plow like that I've seen. I have used and repaired the Ford, Seico and Dearborn disc plows. I have plowed a million acres with one behind an 8N tractor. I too have never seen one with scalloped discs but can see how they would be much better.
The biggest beef I have with the disc plows is their tendency to steer the tractor sideways but this can be somewhat corrected by angling the plow by turning the draw bar so the plow acts like the rudder on a boat. The offset in the draw bar is designed just for that.
I bet the guy who designed that plow used to make bombs in WW2.