GM&O RS1 at Joliet By Angela Cotey | October 19, 2014 | Last updated on August 7, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates The engineer of a Gulf, Mobile & Ohio RS1 eyes the photographer as his locomotive clatters across the Rock Island diamonds at Joliet, Ill., in 1951. The Alco and a caboose are bound for GM&O’s South Joliet yard. Wallace W. Abbey photo