Simplicity 5511 vintage sewing pattern, dated 1964.
Jiffy One Piece Dress:
Shift dress features a scooped neckline.The sleeveless dress has front diagonal darts and a back zipper closing.A self fabric tie belt may be worn Empire style with chain loop carriers at side seams; or at waistline, an optional belt is worn (purchased or self fabric)
Size 16:
Bust 36 inches / 92 cm
Waist 28 inches / 71 cm
Hip 38 inches / 97 cm
Pattern is unprinted tissue, in good condition, factory folded. Envelope has some shelf wear, small hole in one corner, store stamp on the front.
More '60s patterns here:
http://allthepreciousthings.com/collections/1960s
