Nazi code-book goofs
For you hard-core fans of this movie (like me), I thought I would mention what may (or may not) be intentional humor regarding the Nazi code-book that Sig Ruman uses in the beginning of the movie:
1. There's a close-up of the first page that says it's a Nazi Code Book, circa 1944. What's funny is it's in English. It's highly unlikely that an authentic Nazi code-book would have the title in English.
2. If you look closely, as Sig Ruman picks the book up, you can vaguely read the title on the cover as being 'Alice in Wonderland'! It's blurry but that's definitely what it looks like. Of course, this could be explained as just the book jacket being used as a way to disguise the book but it's still worth noting.