page_title: CN U-1-a and U-1-b
hierarchical_section_title: CN U-1-a and U-1-b
caption_attribution_description: Steam Locomotive 6015; Canadian National; Built in 1923; Placed on public display at Jasper, Alberta, Canada; See also: Image:CN 6015 Sign.jpg
context_page_description: The Canadian National U-1-a U-1-b class locomotives were three subclasses of 37 4-8-2 Mountain-type steam locomotives built for the Canadian National Railways between 1923 and 1924. They were retired between 1951 and 1962.
context_section_description: The Canadian National  U-1-a U-1-b  class locomotives were three subclasses of 37 4-8-2 Mountain-type steam locomotives built for the Canadian National Railways between 1923 and 1924 . They were retired between 1951 and 1962 .
caption: CN U-1-a locomotive 6015; On public display at Jasper, Alberta, since July 1972
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