 DATE: Throughout the movie, Lepke wears a clearly obvious 1970s  hairstyle, including moderate sideburns, even though time frame of  the film is the 1920s through the early 1940s. It is even obvious  that he is wearing hairspray, a product that didnt become available  until the 1950s, and wasnt commonly used by men until the late  1960s at the earliest.