Vintage Original Milly of New York Halter backless dress

Excellent vintage condition made in New York. Has 1 small spot inside under right arm only noticeable from the inside of the dress may come out, however, I have not tried buttons and snaps behind the neck to close This is vintage circa 1980s lying. Flat pit to pit is 15 1/2 inches dress is approximately 33 inches long fully lined and it does have pockets zips up the back to close with the Milly signature monogram throughout the dress.