 Both companies were given contracts to produce a batch of thirteen locomotives which would be evaluated by the USATC; the vendor providing the better locomotive would then produce the rest of the required locomotives.Both manufacturers delivered their sample batch in 1952, and after testing the GE locomotives, which were actually produced by Alco as a subcontractor, were declared the winner, and a further batch of 70 Alco MRS-1 locomotives were ordered.No more EMD locomotives were built.