This photograph is Le violon d'Ingres by Man Ray. He had been another artist in the Dada Era, dealing with photographs. I like this photo because it shows the start of how digital artists now work today. This is a standard photograph, with the t holes painted directly onto the photo. It's almost how digital artists take a photo or image and put it into photoshop to combine images or to add filters to a project.
I also like the overall tone of the image, it seems the woman is very relaxed and almost in a subtle, sensual position.