Other mistake: When we see the Church Hymnary being opened, the date on the left-hand page is signed by Margaret in 1928, but the book is dated 1932.
The 39 Steps (1935)
1 other mistake
Directed by: Alfred Hitchcock
Starring: Robert Donat, Lucie Mannheim, Godfrey Tearle, Madeleine Carroll
Revealing mistake: The serial number of the autogyro has been reversed, showing that the stock shot has been reversed for effect.
Richard Hannay: How far is Winnipeg from Montreal?
Mr. Memory: A gentleman from Canada. You're welcome, sir. Winnipeg, the third city of Canada and the capital of Manitoba. Distance from Montreal: 1424 miles.
Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen tossing some litter as Richard and Annabella run from the music hall.