For the Portland Rose, Union Pacific adopted the rather meaningless slogan, “A triumph in train comfort” (or sometimes “A triumph of train comfort”). The former appears here on a piece of on-board stationery for the train. This stationery includes the names of the operating railroads, Chicago & North Western and Union Pacific, which means that it predates October, 1955, when the Milwaukee Road took over the handling of UP trains from Omaha to Chicago.
Repeating the “triumph in train comfort” theme, this postcard (downloaded from wikimedia which got it from an ebay dealer) shows the interior of the Portland Rose‘s air-conditioned dining car, complete with roses on the tables, paintings of roses on the walls and clerestory, and images of roses in the carpet. It is clearly a heavyweight diner, yet the postcard must date from after 1936, when UP began air conditioning its trains.