Largest is 3" with metal back and bar pin. No maker name. Text is "180th Class/Central High." Small gray mark at lower right was dirt now removed although at far left is a 1.25" scratch that shows slightly in most viewing angles. Couple of smaller scratches near the top that show only in reflected light. Button still displays glossy and Exc. Second item is 2-1/8" and this has a back paper by Philadelphia maker James Spencer. This one shows a hand mirror and the word "Central" appears on the button three times. Both are very likely c.late 1940s.