The SP&S favored American Locomotive Company Diesels, as its Diesel roster featured a total of 118 Alcos, but only 20 from General Motors. The latter included the two F3s shown on this card, which were originally numbered 800-A1 and 800-A2.
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When the third F3 was purchased and numbered 802, the first two were renumbered 800 and 801. The 800 was featured on this brochure shown here last week. Later, SP&S also bought four F7s from GM and numbered them 803 through 806. SP&S also owned just one E7, numbered 750, and six GP-9s, numbered 150 through 155. While the Alcos were used exclusively for freight, most of SP&S’s General Motors locomotives, including the GP-9s, had steam boilers so they could be used with and heat passenger cars.