pink flyod back catalogue poster

hi, I'm new to this,
what caused me to stumble upon this network was my confusion as to what picture on the back of the second woman from the left is in the famous pink floyd back catalogue poster, where there are 6 women, with the album pics for wish you were here, the wall, animals, atom heart mother , dark side, and???..

thanks.

it's the 1971 compilation album Relics,..it may be the British release - somebody here knows......;

http://img15.nnm.ru/7/0/d/0/5/dc0cc6...f85c98ab42.jpg

The image on her back is for the CD release of the album and, according to Wikipedia, depicts the real-life version of the contraption designed by Nick Mason that appears on the original UK release album cover.

This contraption was made by Storm Thorgerson and presented to Nick Mason.

The Wikipedia entry also displays the US and Australian release album covers.