Vintage Oleg Cassini Strapless Dress w/Bolero

A rare find. So very vintage, stunning black on black Oleg Cassini sweetheart neckline strapless dress w/matching bolero. Tag says medium but measures more like a xs/small. Dress is fully lined with boned bodice, 3/4 zip. Open front Bolero is also fully lined w/shoulder pads. All over bugle beads and sequins. Approx measurements, taken flat, dress: pit to pit 15.75", top of bodice to hem (front) 36", (back) 33.5", back center kick slit 6", waist 13", hip 16". Bolero shoulder seam to hem 16" front, 17" back, sleeve from shoulder 21", from pit 17", waist 19".