Evening ensemble comprising evening dress and coat in ice blue silk gazar

Evening ensemble of ice blue silk gazar. A: A-line dress; six-panel princess style; full length; round front neckline plunging to deep rounded V-back; long cerise silk organza sheer sleeves mounted and stitched to shoulder 2/3 around, unstitched underarm; sleeves covered with overlapping pennant deep pink-to-pale ombre petals; center back zipper closure; silk organza lining. B: Three-panel unfitted coat; floor length; wide round neckline; 3/4- length tubular set-in sleeves; matching taffeta lining. Label: Balenciaga 10 Avenue George V, Paris #104637. Worn by Mona von Bismarck (Mrs. Harrison William).