This sketch is by Man Ray, dated 1937. According to Shocking! The Art and Fashion of Elsa Schiaparelli, it is based on a photograph he took of Paul Eluard‘s wife, Nusch, with Sonia Mosse. This one, I think. There is another series of photographs of Nusch with a woman named Ady Fidelin that you should definitely go search for. p 131
"Hommage a Nusch," Man Ray, 1937
Chloe and Olivia: Lesbian Findings From History and The Arts 
