Authenticity

Has anyone noticed two posters for theater productions, prominently placed and readable? Very interesting -- for they are for actual productions, placing the action at very specific moments in time. In the first, pre-repeal section, one sees a poster advertising Vina Delmar's "Bad Girl," which was produced at the Hudson Theater by Robert V. Newman (these credits very visible in the film) and played 80 performances starting October 2, 1930, ending in December (at a date unspecified in ibdb). The other appears in the post-repeal section, a poster for "As Thousands Cheer," the famous revue by Irving Berlin and Moss Hart, which opened September 30, 1933, and was still running on December 5 of that year, the day Prohibition ended -- and the day on which the rest of the movie's action begins. Nice period touches, more specific than one would expect.