True, Court quotes 16,129,850 for the 1916 RE penny so there must have been many individual obverse working dies. As I understand it, the puncheons would build up the design in incuse, the result being used to strike a master die which is a relief die. From this, whatever number of incuse working dies necessary could be struck. It would seem likely that only one master die would be prepared, and thus the border tooth puncheon would only be used once in building up the master die. Logically any progression in the damaged tooth would have to occur when sequentially preparing new working dies from the master. Does this seem reasonable? To answer Pecks earlier question re the non-continuation of the RE obverse, perhaps the damaged master die was deemed to require replacement, and rather than going back to the individual punches to build up a fresh master, they simply returned to the previous non RE master to produce the next generations of working dies.
Jerry