This photo and the two which follow show the E550 still on the Missouri Pacific flat car when it arrived at the museum in Summer 1968.
A second photo
...and a third
View an Acrobat document containing various museum press releases and photos of the locomotive being offloaded at New Orleans. Note the incorrect statements in the stories and press releases stating that this locomotive is "the first." The truth of the matter is that the E550 series was arguably the first mass-produced electric locomotive type in Italy, but there were other types that preceded it.
Here's a pair of black-and-white photos showing the E 550 being unloaded at the museum.
Photo Courtesy National Museum of Transport, St. Louis MO