I have a Playrite roll with a "P" tab that matches the picture, and
the box label says Milwaukee.  This may help solve the mystery.

Robert Couser

 [   Playrite "P" end tab
 [ http://www.mmdigest.com/Attachments/18/08/14/180814_183303_IMG_20180814_200026711.jpg 
 [   Label; at bottom is "Staffnote Player Roll Company, Milwaukee"
 [ http://www.mmdigest.com/Attachments/18/08/14/180814_183303_IMG_20180814_193438071.jpg