Another view of the previous subject offers a broadside of the entire four-unit combination of ALCo-GE F units. Lead A unit 1018 is trailed by B units 3333 and 3334 and A unit 1036. The 1500-horsepower A units, delivered in 1947, were classed DFA-3; the 1600-horsepower B units were delivered in 1951-52 and classed DFB-7.