Philadelphia Bartram High School Disney Huey Dewey Louie Pinback from the collection of Hud Baer

This pinback is from Bartram High School in Philadelphia and was issued to commemorate the graduation of the class of June 1942.   I am looking to obtain another copy of  this button and find out more about how it came to be issued by the school.  It is a licensed Disney product.  I am also looking for a similar pinback showing Huey, Dewey, and Louie that was issued in February 1942.  The Philadelphia High Schools graduated two classes a year back then.  I am trying to find out as much as possible about these Philadelphia pinbacks, especially those showing comic strip characters.  Any help would be appreciated. Hud Baer