AT&SF 1101:
This loco was built in 5/1960 with EMD serial number 25574. She was built as a freight roadswitcher, model GP20.
She became AT&SF 3101.
She was rebuilt as a GP20u in 3/1978 and became AT&SF 3001.
She became BNSF 2001.
She became PREX 3101.