Simplicity 3528; ca. 1960; Teen One-Piece Dress with Detachable Collar: Dress has back button closing and full gathered skirt. V. 1 is sleeveless, has contrasting detachable collar, rick-rack trim, purchased belt and ribbon bow. V. 2 and 3 have bateau necklines and elbow length set-in sleeves. V. 2 has rick-rack trim. V. 3 features embroidered eyelet edging & ribbon trim.