I found this yesterday, I could use some help in ID'ing it. On the back I think it reads "PAILA" and the other I cannot make out maybe it starts off "HOR...." or "HOB....". Thanks.
It is a General Service button. HORSTMAN, PHILA. I don't see the specific backmark listed in Albert's the book but it appears to be simlar to Albert's GI 98 (1875-1902)