While there is evidence that there were different sheet layouts used in the
PD 150 printings I think the miscut Donlin came from one of the two different
plate scratch sheets that had two sets of fronts that shared the same back plate.
If that's the case then the partial miscut back on Donlin should be Mordecai
Brown (Cubs) or a slight chance it could be Kling.
http://imageevent.com/patrickr/t206p...=0&w=4&s=0&z=9
Donlin and Elberfeld have the same exact plate scratches and there is an Elberfeld that has the same exact mark on the back as the miscut Donlin.