The Coronation Scot was a named express passenger train of the London, Midland and Scottish Railway inaugurated in 1937 for the coronation of King George VI and Queen Elizabeth which ran until the start of the war in 1939. It ran on the West Coast Main Line between London (Euston station) and Glasgow (Central station), stopping at Carlisle for crew change and to pick up and set down passengers to and from London only. The service was designed to compete with the rival services on the East Coast Main Line, for prestigious London to Scotland traffic. It was scheduled to complete the journey from London to Glasgow in 6 hours 30 minutes (Wikipedia).
The artwork is by Bryan de Grineau, who also created The Irish Mails and Scot Passes Scot posters. 13" x 19".