1.25” with backpaper by New York firm Pioneer. Quoted text is on top segment of button while center area shows massive building with many people in the foreground. Tiny text on bottom of building reads “State Exhibit Building/Pioneer M’fg Co. New York U.S.A.” We’re not sure exactly what state building is shown but possibly New York since the button is New York made. At bottom right is a tiny panel with text “Copyright 1906 by Jamestown Photo (last word unreadable).” Exc. and displays Mint. Only example we’ve seen.