 The Valparaíso trolleybus system has been in operation since 1952, and in 2019 it continues to use some of its original vehicles, built in 1952 by the Pullman-Standard Company, along with an assortment of other vehicles acquired later.Some of Valparaíso's Pullman trolleybuses are even older, built in 1946–48, having been acquired secondhand from Santiago in the 1970s.The surviving Pullman trolleybuses are the oldest trolleybuses still in normal service anywhere in the world, and they were collectively declared National Historic Monuments by the Chilean government in 2003.