At this point I don't believe the A+B+C+D rule is concrete. I think it's a good way to look at the 190 subjects from a broad perspective but it isn't a hard and fast rule for every one of the subjects.
I'm skeptical that all 190 subjects were printed with Broad Leaf 350, and even more skeptical that they all were printed with Drum 350. I believe most were, but not all.
When it comes to the 37 print group 3 subjects that were printed with AB350NF, 34 have been confirmed with Drum 350. As scarce as Drum's are it's certainly possible that the other three could still be confirmed, but my belief right now is that they were not printed with a Drum back.
|