Simplicity 7959 vintage sewing pattern, dated 1977.
Misses’ Jiffy Top and Drawstring Skirt and Pants (Top sized for stretch knits only):
Top with bateau neckline encased in braid has short set-in sleeves with top-stitching. Pants and skirt with side pockets have waistline casing with drawstring.
Bust 34 inches/ 87 cm
Waist 26 1/2 inches / 67 cm
Hip 36 inches / 92 cm
Pattern is partly cut and checked complete. Envelope has some wear and small tears around opening.
More '70s patterns here: