page_title: ALCO S-6
hierarchical_section_title: ALCO S-6
caption_attribution_description: Southern Pacific ALCO S-6 Bo-Bo switcher (with 244 engine) No.1231 at El Centro, 8/70.
context_page_description: The Alco S-6 was a diesel-electric locomotive of the switcher type constructed by ALCO of Schenectady, New York; a total of 126 locomotives were built between May 1955 and December 1960. The S-6 was an improved version of the earlier S-5.
context_section_description: The Alco S-6 (specification DL 430) was a diesel-electric locomotive of the switcher type constructed by ALCO of Schenectady, New York; a total of 126 locomotives were built between May 1955 and December 1960. The S-6 was an improved version of the earlier S-5.
caption: SP No. 1231 at El Centro, California, in 1970
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