Cover of one of their yearbooks seems conclusive: Explore 1977 Strong Vincent High School Yearbook, Erie PA - Classmates
I still feel pretty sure Bramblefind is correct, mostly based on the words around the shield being Strong Vincent High School. 19 and 57 (1957) on the sides of the red portion shown in first photo.
Well, he's a she, so............Kapidr only said the first word MAY be strong, he said nothing about Vincent high school. He posted this 2 days ago and vanished.