Found this old postcard in a hoarde of postcards that my mom saved. It is printed on the back: Continental Illinois National Bank and Trust Company of Chicago 231 La Salle Street. In recognition of the American railroads and in tribute to their great part in building the nation, is sponsoring the "Bank Of Gold Gulch" as a part of a typical mining town of the past at the Chicago Railroad Fair". Postmarked Sept 18, 1949.