Simplicity 5066 vintage sewing pattern, dated 1960s.
Misses' One-Piece Jiffy Dress:
Simple to Make A-line dress has a high round neckline, kimono-style sleeves and back zipper closing. V 1 features 3/4 length sleeves and a self-fabric tie belt worn below waistline and held in place with 2 thread loop carriers. V 2 has short sleeves and is detailed with top-stitching.
Size 12:
Bust 32 inches / 81 cm
Waist 25 inches / 64 cm
Hip 34 inches / 86 cm
Pattern is UNPRINTED, checked complete. Envelope has some small tears around top.
More '60s patterns here:
http://allthepreciousthings.com/collections/1960s