Vintage 1970s Black Floral Dress, Herman Marcus Dallas Size XS

Semi sheer black floral long sleeve dress. It zips up the back. It comes with a black ribbon that was with it when I purchased it, but I'm not sure if this is the original belt. Brand - Herman Marcus Dallas Size - approximately a modern XS but check the measurements Shoulders - 14.25" across Chest - 18.25" pit to pit Sleeves - 23" from shoulder seam Waist - 13.25" across Hips - open Length - 40.5" (18" bodice, 22.5" skirt) Condition - I don't see any flaws