From the envelope..."Semi-fitted jumpsuit with flared leg has round neckline and front zipper closing.  Sleeveless or full length sleeves.  With or without patch pockets, self belt, lace and top-stitch trim.  Purchased sweater."

 

Pattern has been cut and is complete and in good shape.  Includes instructions. Couldn't find a date but I'm thinking it's from the 70's.

Size 8 - Bust 27, Waist 23 1/2, Hips 28