Other mistake: Chico sells Groucho a paper with the name of a horse who is sure to win. It says "ZVBXRPL." Chico explains that the name is in code and then sells Groucho a code book. Groucho looks up the name and says "ZVBXRPL, page 34" but he is looking at a right-hand page. Page 34 would be a left-hand page.
A Day at the Races (1937)
1 other mistake
Directed by: Sam Wood
Starring: Chico Marx, Groucho Marx, Harpo Marx, The Marx Brothers, Allan Jones
Continuity mistake: In front of the betting windows, Chico sells Groucho the code books and master code books, then tells him he needs the entire set of Breeder's Guide books. Groucho pulls out his money and said "Give me all four", but Chico hands him five books.
Flo: I want to be near you. I want you to hold me. Oh! Hold me closer! Closer! Closer.
Dr. Hackenbush: If I hold you any closer, I'll be in back of you.