Vintage Beyond formal dress new without tag

Exquisite.. that is the only word I can think of for this black satiny strapless dress with embroidered flowers at the bodice, around to the back.. and around the front scalloped opening on the hem.. did you notice the blue at the opening at the bottom front? The blue is also carried through the ties, and the flower accents. Oh and the rhinestone sparkles throughout the flowers. There is a string attached that had a tag.. but the tag is gone so new without tag..