Simplicity 5920 vintage sewing pattern, dated 1973.

Misses' Unlined Jacket or Vest, Pants and Short Skirt - (Approximate Length of Skirt is 17"):

The princess seamed unlined jacket or vest with front and back yokes have "V" shaped neckline, front separating zipper, pockets concealed in side seams and top-stitching trim. The jacket has long set-in sleeves. The pants with front zipper have waistband. The skirt with back zipper has waistband. 

Size   12:

Bust   34 inches/ 87 cm

Waist 26 1/2 inches / 67 cm

Hip    36 inches / 92 cm

Pattern is cut and checked complete. Envelope has spotting, shelf wear, large tear across back.

More '70s patterns here:

http://allthepreciousthings.com/collections/1970s