Tracey Reese for Anthropologie sleeveless embroidered dress size small

This is a beautifully unique embroidered dress purchased from Anthropologie. It is sleeveless and completely unzips in the back. It originally came with a simple black slip underneath, but I have accidentally misplaced the slip as it was detachable and I used it under other garments. This was only worn once or twice and in like new condition besides the missing slip. There are no tags inside. I’m guessing they must have been sewn on the slip? -asymmetrical back. -zipper -unique embroidery -excellent condition