Until recently, we thought the 1859 Obverse 45a was the reverse die pair king with 11 .
But, there is a new winner now with 12! The discovery that Obverse 48 and Obverse 57 are the same led to combining the two in the Haxby 1859 Catalog, and the 9 reverses that were part of the Obverse 57 group have been added to the previous 3 from the Obverse 48 group.
So all of you 1859 collectors can look forward to a little March madness as you renumber your die pairs. All of the information is in the latest News Page update in the Haxby catalog.
I'd forgotten about that, Rob. The variation in the outturn from dies for both the Provincial cents is quite remarkable. Of course, that was before the scientific studies that identified the contaminants that significantly shortened die life.