Simplicity 8542; ©1969; Misses' One-piece Dress with Detachable Back Panel … Designer Fashion: (Including "Designer Touch" Leaflet ... "Corners, Clips and Curves"). The lined evening dress with front princess seaming, back zipper and lowered neckline in front and back has skirt stitched to bodice above normal waistline. A matching belt with detachable back panel is featured buttoned to dress front.