First is 7/8” brass lapel stud for “Art Gallery Centennial Exhibition Philadelphia 1876.” NM luster. Second is also a brass lapel stud but with beautiful color porcelain insert reading “Exposition Chicago 1893.” This piece is 13/16”. Only a trifle of luster loss. Next is 13/16” silvered brass lapel stud showing cornucopia at center with text around “International Congress Of Bankers And Financiers.” Exc. Next with brass hanger and brass luster on shield and eagle positioned over silver luster world globe is 1-3/8” tall. Text reads “World’s Columbian Exposition 1893.” NM. Last is 1.5” real photo button by Haskell, St. Louis. Sepia button displays “Arch Of States” with text across the top of the structure “Trans-Mississippi & International Exposition.” This is one of a series and a rare one. NM displaying Mint.