Vintage black ladies cocktail dress, size missing

Vintage ladies black Cocktail Dress, size missing, measurements as follows A-A17”, back length 38”, shoulders 16”, 100% polyester, fully lined, shoulder pads, says Spectator inside, probably a sample, deep Avon neckline with black flower at bottom of V, flowers has beading in the center, flares out from v neckline, Zipper in right side, short sleeves, very beautiful dress very well made, much prettier then shows in pictures, new without tags, great dress