| AT&SF GP20 1150 in Joliet, Illinois on July 11, 1965, photo by Chuck Zeiler. Built in October 1961 (c/n 26856) on EMD Order 7609, it was renumbered to 3150 between late 1969 and early 1970. It was rebuilt to GP20u 3050 in December 1977, became BNSF 2035, and later, becoming PREX 2035. Note the first trailing unit is EMDX SD40X 434C, one of the test beds for the new 645 prime mover, eventually becoming UP 3042. |