I acquired this undated menu with several others that were dated from the late 1950s. However, this one might be more recent as it is printed on both sides, one side in English and one in French. Canada’s Parliament passed the Official Languages Act in 1969, which spurred many companies to print signs and other items in both languages. So this menu could from a later year, but the prices are similar to menus from late 1950s.
The menu is pretty limited, listing only a few soft drinks, lemonade, Bromo Selzer, cigars, and cigarettes. CN must have had another menu for alcoholic beverages.