The ideas of what is salacious seemingly has changed remarkably since those days.
A depiction of a prepubertal girl with genitalia on display apparently isn't, but in a similar collection, a dancer in a costume that is skintight and flesh-coloured but actually displays nothing IS, to the extent that she got three months in the slammer for wearing it.

That costume was comical rather than sexy to (my) modern eyes. Fishnet tights too big to catch a mackerel, metal disks in the groin and waist area.....
The poses were quite similar. The child was standing, the woman leaning back, both with their arms above their heads. The child looked bemused, but the woman looked smugly challenging.