1929 advertisement for the Golden Arrow Limited Pullman service between London Victoria Station and Paris Gare du Nord. The artist is unknown. The illustration, which features Lord Nelson class loco 853, Sir Richard Grenville, was available separately and even as a jigsaw at WH Smith's!
Curiously, this is the only reference I can find to this famous train as the Golden Arrow Limited, either in poster/advert form or in written material - it's always Golden Arrow or Flèche d'Or.
This is also the only use I can find of the strapline 'Key to the Continent'.
Keywords: Golden Arrow Limited; Flèche d'Or, Pullman; poster; advert; Southern Railway; 1929; Lord Nelson class; 853; Sir Richard Grenville; London; Londres; Victoria; Paris; Gare du Nord; Key to the Continent