Lionel’s O-27 Union Pacific streamliner By | July 16, 2010 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Lionel’s O-27 Union Pacific streamliner is probably the most endearing offering from Lionel’s 1950, 50th anniversary catalog. 800 x 600 wallpaper1024 x 768 wallpaper1600 x 1200 wallpaper