When Uncle John refers to "Nine Yokohama" he is talking about a famous Japanese
brothel.
When the prison sergeant says "Take a look at the 400 and see that they're all there", the reference is the 'Four Hundred', a term used to describe the social elite of New York, especially in the last half of the 19th Century.
The failure of the original copyright holder to renew the film's copyright resulted in it falling into public domain, meaning that virtually anyone could duplicate and sell a VHS/DVD copy of the film. Therefore, many of the versions of this film available on the market are either severely (and usually badly) edited and/or of extremely poor quality, having been duped from second- or third-generation (or more) copies of the film.
During the impressive film career of Ginger Rogers - her Hollywood era totaling 73 feature appearances between 1930 and 1965 - only five of her movies failed to be rewarded with contemporary New York Times reviews: this picture, Rafter Romance (1933), the British-made Beautiful Stranger (1954), The First Traveling Saleslady (1956) and Heirate mich, Gauner! (1964).
The earliest documented telecasts of this film took place in New York City Sunday 18 April 1948 on WCBS (Channel 2) and in Los Angeles Sunday 20 November 1949 on KFI (Channel 9).