Advance 7706; 1950s; Girl's Dress and Jacket. (View 1) Buttoned Spencer jacket is worn over a princess dress which has a flared seven-gore skirt. Brief jacket has a big collar and detachable over-collar in contrast; three-quarter cuffed sleeve. Scoop neck dress has puff sleeves and a rising waistline. With the jacket on, the effect is of a one-piece dress. (View 2) Jacket in contrast.