An illustration of this dress, along with a swatch of the orange fabric, can be found as look #26 in the Fall-Winter 1965-66 Haute Couture Collection in the Yves Saint Laurent Foundation Archive.

Orange organza ribbon A-line dress with beaded and embellished neckline, cap sleeve hems, and skirt hem, and center back zipper closure.
Unlabeled, Attributed to Yves Saint Laurent
Size Label: N/A
Style/Serial No.: N/A

Approximate Measurements:
Shoulders: 14"
Chest: 34"
Waist: 34"
Hips: 38"
Length (high shoulder point to hem): 38.5"
Sleeve (center back neck to hem): 12.25"