Here’s what appears to be another prewar blotter advertising Great Northern’s premiere train. Where the last one had contact information for agents in Seattle and Vancouver, this one is for Fargo. Did they have separate blotters for every city on the route?
The blotter has the schedule for the Empire Builder. This schedule matches the 1940 timetable that someone has posted on line (see page 7), so it is possible the blotter was made in that year.