SP 5323
This loco was built in 9/1953 with EMD construction number 18388. She was built as a reserve passenger engine with steam generator and twin 1200 gallon tanks, one for diesel fuel and one for boiler water. She was painted in standard for the "tiger stripe" colors and was delivered with barrel oscillating and twin sealed beam headlights at each end.
She was assigned number SP 2730 in the 1965 system renumbering.
All of the SD7's were renumbered as a group in 1973 to make room for new MP15 switch engines. This unit was renumbered SP 1430.
She entered the GRIP program and emerged as SP 1523 on 2/28/1980.
She is possibly one of 3 or 4 SD7's (along with SP 1411, 1413 and 1425) known to have had red frame stripes applied at some point reportedly by the Tuscon Division mechanical forces for unknown reasons.