After the Blue Bird, the next domeliner to hit the timetables didn’t even have a name. This was the Union Pacific’s Portland-Seattle pool trains, numbers 457 and 458 (the other trains in the pool being owned by Great Northern and Northern Pacific). The UP made these trains into domeliners by buying the General Motors Train of Tomorrow when that train finished its national tour at the end of 1949.
The cars were first added to the Portland-Seattle trains on June 18, 1950. In keeping with the Union Pacific’s “city of” train names, some people have called this train the “City of Seattle,” and some even claim that UP employees informally used that term in the 1950s. However, the name was not used in any timetable.