A "Perfume Apple" was a small, handmade smoke bomb or acid irritant, typically packed in a glass perfume sample. They were widely used by hoods and wise guys circa early 1930's to intimidate small businesses into paying extortion for protection rackets.
The $150 per year membership in the "Restuarant Owners' Benevolent Association" would be the equivalent of over $3,400 in 2024.
The $10,000 retainer Mary turns down from Frank would be worth about $227,000 in 2024.
A contemporary article in Film Daily noted Matty Fain replaced George E. Stone in the role of Augie Simelli when Stone came down with pneumonia.
The film's working title was "Lawyer Woman."