SP 6104C
This loco was built in 10/1947 with EMD construction number 4551. It was built as a 1500 hp F3 B-unit. It was painted in the SP's standard for the time black widow colors.
Her alpha suffix was to have been done away with when the F3 fleet was renumbered in late 1949. She was to have became SP 8009, but was sent to the T&NO and renumbered as T&NO 509 on 06/15/1949 prior to this number being applied.
She was rebuilt as an F9M at Houston and renumbered T&NO 721 in 12/12/1956.
She was retired on 01/20/1970 and sold to EMD on 02/25/1970.