More Philadelphia High School Graduation Pinbacks

Here are some recent additions to my small group of pinback buttons issued by the graduating classes of Philadelphia High Schools. The tradition of having a special "mascot" for each graduating class dates back to at least the 1930s. If anyone has any information about how any of these pinbacks came about, I would appreciate it if they could contact me at hudnsher@comcast.net
Additionally, if anybody can identify the character on the June 1951 pinback from Dobbins High School, Jan 1960 from Central High School, or the Jan 1964 from Central High School, I sure would appreciate it.