Evening ensemble of bodice and skirt in black satin with jet bead trim

Evening ensemble of black satin. A: Fitted, princess-style bodice; hip-length; U-neckline; sleeveless; silk braid and jet bead edging at hem; side zipperat proper left. B: Straight, floor-length skirt; waistband at natural waist; lightly pleated at waist; silk braid and jet bead edging at hem; back snap closure; silk lining. Label: "Balanciaga, 10 Avenue George V, Paris / [?]88027[?].