Simplicity 3519; ca. early 1960s; Slenderette - Misses' and Women's One-Piece Dress with Two Skirts and Detachable Collar: Dress has collar, set-in sleeves and pointed front band with button trim. A zipper is concealed under front band. V. 1 has slim skirt with soft pleats at front waistline and back kick pleat, 3/4 length sleeves and contrasting detachable collar worn over self collar. V. 2 has softly pleated skirt and short sleeves.