Great Northern a Type SD7 Number 550, a Type SD7, at Minot, (N.D.), June 1968.

Great Northern Number 551, a Type SD7, at Minot, (N.D.), June 1968.

Great Northern Number 551, a Type SD7, at Minot, (N.D.), June 1968.

Great Northern diesel locomotive 5406, an Electro-Motive Division (EMD) NW3 at Minot, North Dakota in 1942.

Great Northern Diesel Locomotives led by Number Number 350, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1948.

Great Northern Diesel Locomotives led by Number Number 351, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1948. Note window cleaning in progress.

Great Northern Diesel Locomotives led by Number Number 354, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1948.

Great Northern Diesel Locomotives led by Number Number 354, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1950.

Great Northern Diesel Locomotives led by Number Number 355, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1950.

Great Northern Diesel Locomotives led by Number Number 356, an Electro-Motive Division (EMD) F3A, at Minot, North Dakota, in 1951.