Th century and based on rules adopted in March 1903 but the date of the exam isn’t noted. This exam is early 20.
Chicago & North Western RR Chicago St Paul Minneapolis & Omaha Safety Rules 1944
1923 Chicago, St. Paul Minneapolis And Omaha C. ST. P. M. & O Railway Rules Book
Large Locomotive Wrench Chicago St. Paul Minneapolis & Omaha RR C St P M & O Ry
1891 Iowa Annual Report Chicago St Paul Minneapolis & Omaha Railway ~ 20 Pages
1933 & 1935 Chicago St Paul Minneapolis RR Annual Reports- The Omaha Road
