L&N 1203

This loco was built in 5/1965 with EMD serial number 30435. She was built as a freight roadswitcher, model SD35.

She was renumbered L&N 4521 by the L&N.

She became SBD 4521 at the creation of the Seaboard System railroad.

She became CSXT 4521 at the creation of the CSX railroad.