Start date based on when first mentioned in Archie (Gerald G. Swan, 1950 series), listing in Bookseller's Publications of the Week (Saturday 17 November 1951) as October 1951, and promotion in 1952 albums. Issue #20 dated November 1958 according to promo in Archie (Gerald G. Swan, 1955 series) #11, so final issues in 1959.