Excellent photos, Great Rao! These certainly are superior to my poor microfilm scan. Now we have enough details to seriously consider that "cover art" idea.
By the way, look at the girl over William Aronis' left shoulder in the last photo. She's wearing a triangular "S-shield".
It would be nice if Mr. Aronis can provide us with more personal recollections of this special day. Certainly it doesn't seem to get enough attention from Superman fans and scholars.
And Happy Superman Day! July 3rd is the 66th anniversary of this event! Best wishes to William Aronis (and to Maureen Reynolds), the FIRST "Superboy" and "Supergirl"!