 In 1927 the John Bull again traveled outside the museum. The Baltimore and Ohio Railroad was celebrating its centenary that year in its Fair of the Iron Horse in Baltimore, Maryland. Since the locomotive's original tender (fuel and water car) had deteriorated beyond repair and was dismantled in 1910, the PRR built a replica of the tender at its Altoona, Pennsylvania, workshops. The locomotive was also refurbished in Altoona for operation during the fair. This fair was the last steam up for the locomotive until 1980.
