The Artists bow seems to be worn by women in their late teens or early twenties. As with all fashions accessories adopted by groups of young women it is inexpensive and conspicuous.
Many of these accessories were contemperories and a girl could choose which one to adopt or might wear more than one at the same time.
Photograp above by Wakefield's Ealing W5 Inscribed: Yours Sincerely Gwen Aug28/8/19
Date 1919: Age about 19 years old