Question: In what year did an iconic symbol of the flapper appear in a silent crime drama?

Context articles: Miss 139
Shadow of the Law (film)
Louise Brooks
Melton (cloth)
The Street of Forgotten Men
Hearts Asleep
The Soul of Broadway
The Bait (1921 film)
Traffic in Souls
The Deep Purple (1920 film)

Miss 139 is a 1921 American silent crime drama film produced by A. H. Fischer and distributed by Jans Film Service and Sherman Productions Corporation.
 B. A. Rolfe was the director and Charles Logue wrote the story and the screenplay.
 Its Swedish-born star Diana Allen had been a Ziegfeld girl.
Shadow of the Law was a 1926 American silent crime drama starring Clara Bow as a woman sent to prison for a crime she didn't commit.
 Directed by Wallace Worsley, the screenplay was written by Leah Baird and Grover Jones and was based on the novel "Two Gates", by Harry Chapman Ford.
 "Shadow of the Law" is now regarded as lost.
Mary Louise Brooks (November 14, 1906 – August 8, 1985), who worked professionally as Louise Brooks, was an American film actress and dancer noted as an iconic symbol of the flapper, and for popularizing the bobbed haircut.
Melton cloth is traditionally made of wool and is woven in a twill form.
 It is thick, due to having been well fulled, which gives it a felt-like smooth surface.
 It is napped and very closely sheared.
 Meltons are similar to Mackinaw cloth.
 It is a very solid cloth in which the twill weave pattern is completely concealed due to the finishing processes.
 Because of its dense, quasi-felted texture it frays minimally or not at all.
 It is hard wearing and wind and weather resistant.
 Its main use is for heavy outer garments and coats and for blankets.
 In lighter weights melton cloth is traditionally used for lining the underside of jacket collars.
 It was developed in the Leicestershire town of Melton Mowbray, from which it derives its name.
 This town is the traditional centre of English fox-hunting, and black and scarlet hunting coats are traditionally made from melton cloth, due to its weatherproof qualities.
 In England not only is melton used for the scarlet hunting coat, an iconic symbol of the upper-class elite, but it is also used in black for the donkey jacket, an iconic symbol of the working class labouring man.
 Both uses rely on its weatherproof qualities.
The Street of Forgotten Men is a 1925 American silent crime drama film directed by Herbert Brenon and released by Paramount Pictures.
 The film features the debut of actress Louise Brooks in an uncredited role.
Hearts Asleep is a lost 1919 American silent crime drama film directed by Howard Hickman and produced by and starring his wife Bessie Barriscale.
 It was distributed through Robertson-Cole Company.
The Soul of Broadway was a 1915 American silent crime drama film produced and distributed by the Fox Film Corporation and directed by Herbert Brenon.
 Popular vaudeville performer Valeska Suratt starred in the film which was also her silent screen debut.
 "The Soul of Broadway" is now considered lost.
 It is one of many silent films that were destroyed in a fire at Fox's film storage facility in Little Ferry, New Jersey in July 1937.
The Bait is a 1921 American silent crime drama film produced by and starring Hope Hampton, directed by Maurice Tourneur, and distributed by Paramount Pictures.
 John Gilbert, then working for Tourneur, wrote the scenario (silent film version of a screenplay) based on the stage play "The Tiger Lady" by Sidney Toler.
 Filmed in 1920, the picture was released a day after New Year's 1921.
 "The Bait" is now considered to be a lost film.
Traffic in Souls (also released as While New York Sleeps) is a 1913 American silent crime drama film focusing on forced prostitution (white slavery) in the United States.
 Directed by George Loane Tucker and starring Jane Gail, Ethel Grandin, William H. Turner, and Matt Moore, "Traffic in Souls" is an early example of the narrative style in American films.
 The film consists of six reels which was longer than most American film of the era.
The Deep Purple is a 1920 American silent crime drama film directed by Raoul Walsh from a play co-written by Wilson Mizner and Paul Armstrong.
 The picture stars Miriam Cooper and Helen Ware and is a remake of the 1915 film "The Deep Purple".
 It is not known whether the 1920 film currently survives.