1939: The original John Bull is displayed in the opening of the New York World's Fair 1940: A replica of the John Bull, built by engineers at the Pennsylvania Railroad's Juniata Shops in Altoona, Pennsylvania, is displayed at the New York World's Fair, and the original is returned to the Smithsonian.
1939: John Bull este expusă la deschiderea New York World's Fair 1940: O replică a lui John Bull, construită de inginerii de la atelierele Juniata ale Pennsylvania Railroad din Altoona, Pennsylvania, este expusă la New York World's Fair, iar originalul este restituit Institutului Smithsonian.