A crewman waves from the catwalk of Seaboard Coast Line GP40 1535 as the train waits on the main line at Emory, Georgia on March 12, 1972. The lead unit was formerly Seaboard Air Line 620, delivered by Electro-Motive in 1966. It became Seaboard System 6691 and then CSX 6691, but is no longer on the CSX roster. No information about its eventual disposition is available. My brother, David Leonard, took the transparency.