I kept thinking that I've seen it before and then AC Delco came to mind and ruined any hope remembering.
I found a quote on a site which could mean the wearer could be a local to where it was found.
(Poorer folks wore buttons, too, but they had to craft them laboriously by hand. In Colonial America until the early 20th century, working-class families counted themselves lucky if they owned a hand-held button-mold. You heated up the mold in a bed of hot coals, then filled it with molten lead or pewter, which set into a button shape.)
So maybe a local.