Northern Pacific Number 5401D, an Electro-Motive Division (EMD) Type FT, at Livingston, Montana, June 1969.

Northern Pacific Number 5407B, an Electro-Motive Division (EMD) Type FT, at Livingston, Montana, June 1969.

Northern Pacific Number 5407B, an Electro-Motive Division (EMD) Type FT, at Livingston, Montana, June 1969.

Northern Pacific Number 6003A, an Electro-Motive Division (EMD) Type F3, at Livingston, Montana, June 1969.

Northern Pacific Number 6003A, an Electro-Motive Division (EMD) Type F3, at Livingston, Montana, June 1969.

Northern Pacific Number 6003D, an Electro-Motive Division (EMD) Type F3, at Livingston, Montana, June 1969.

Northern Pacific diesel locomotive number 6016 in the yard at Livingston, Montana, on May 23, 1952. NP 6016 is an F-7 built by Electro Motive Division of General Motors Company in 1950. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number 7000 in the shops at Livingston, Montana, on May 23, 1954. NP 7000 is an F-9 built by Electro Motive Division of General Motors Company in 1954. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number 7004D being repaired in the shops at Livingston, Montana. NP 7004D is an F-9 built by Electro Motive Division of General Motors Company in 1954. Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,

Northern Pacific diesel locomotive number RCU1 at the shops in Livingston, Montana, in August 1972. This unit was converted to a "Locotrol" radio controlled booster from F-7 No. 6010C in 1968. It was assigned to operate with U25C No. 2502 as the master. . Photo by J.M. Fredrickson. Other Subject Classes: diesel locomotive,