Simplicity 9621 vintage sewing pattern, dated 1971.

Misses' and Women's Dress or Tunic, Vest and Pants:

The dress or tunic with back zipper has long set-in sleeves, low "V" shaped neckline and tie collar fastened with optional purchased ring. The vest is lined. The pants with back zipper have elastic waistline casing. 

Size  20:

Bust  42 inches / 107 cm

Waist 33 inches / 84 cm

Hip    44 inches / 112 cm

Pattern is partly cut and checked complete, EXCEPT FOR both neck facings, which are MISSING. Envelope is in good vintage condition, with some small tears around the opening.

More '70s patterns here:

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