In the opening scene of the movie, a date mismatch in the newspaper & the overlying captions show a continuity error. The newspaper is dated as December 20th 1930, but when the photograph in the same newspaper comes to life, revealing the live action in the movie, a caption is superimposed saying "Pitsburg PA, 1931".
The opening credits show the story is set in 1931, however, there is an anachronism in that the Mayor is wearing a United States National Defense Service medal. These medals were first issued in 1953 by President Eisenhower. The medal is, therefore, incorrect for the time period.
Also, the Mayor is wearing the medal on his right side, whereas it is traditionally & correctly worn on the left side.
Also, the Mayor is wearing the medal on his right side, whereas it is traditionally & correctly worn on the left side.