Burlington Northern Diesel Locomotive Type SW1200 Number 170, Type NW2 Number 452, and Type SW1500 Number 305 at Minneapolis, Minnesota on April 23, 1979. Number 170 was built by Electro-Motive Division (EMD) in January, 1958 as Northern Pacific Number 170, Builder Number 24034. It was retired in March, 1992. Number 452 was built by Electro-Motive Division (EMD) February, 1939 as Great Northern Number 5304, Builder Number 863. It was retired in May, 1982. Number 305 was built by Electro-Motive Division (EMD) October, 1967 as Great Northern Number 205, Builder Number 33207. Photo by Al Christianson.