John Bull is a British-built railroad steam locomotive that operated in the United States. It was operated for the first time on September 15, 1831, and it became the oldest operable steam locomotive in the world when the Smithsonian Institution operated it in 1981. Built by Robert Stephenson and Company, the John Bull was initially purchased by and operated for the Camden and Amboy Railroad, the first railroad in New Jersey, which gave John Bull the number 1 and its first name, "Stevens". The C&A used the locomotive heavily from 1833 until 1866, when it was removed from active service and placed in storage. After the C&A's assets were acquired by the Pennsylvania Railroad (PRR) in 1871, the PRR refurbished and operated the locomotive a few times for public displays: it was steamed up for the Centennial Exposition in 1876 and again for the National Railway Appliance Exhibition in 1883