1.75" no maker's name but with spring pin holding  ribbon in the orange and blue official fair colors suspending a 1-3/16" brass medallion picturing on the front the Trylon and Perisphere before a stack of rounded clouds while the reverse has similar cloud formation around the spire of the Empire State Building. Front text is "Souvenir New York World's Fair 1939" and reverse is "Empire State Building" plus a half circle of good luck horseshoes. Tiny age on the ribbon, all else Exc.