Found these to be intersting beyond the standard historical facts. It amazing in what we take for granted in international travel was once considered specialized. Also they technology they didn't have, but still did the same job.
http://www.youtube.com/watch?v=n9CVbDaXWnY (http://www.youtube.com/watch?v=n9CVbDaXWnY)
http://www.youtube.com/watch?v=V-63IBn6c_M (http://www.youtube.com/watch?v=V-63IBn6c_M)
:)