This is a wonderful and absolutely superb 1950's French nude erotic drawing, its unsigned but reminds me of Alain Aslan, or even Avel De Knight, perhaps Auguste Rodin, although somebody said it may even be Hungarian. 

Black and blue pastel or charcoal on cream paper, the paper has scuffed edges that would not be visible after framing

Dimensions: 28.5 cm x 17.75 cm or 11" x 7" approx. Frame not included.