Simplicity 6467 vintage sewing pattern, dated 1974.

Misses' Jumper or Top, Skirt and Pants:

The jumper or top with back zipper has low round neckline, optional welts, top stitching and purchased belt. The skirt and pants with back zipper have elastic waistline casing. 

Size  12:

Bust  34 inches/ 87 cm

Waist 26 1/2 inches / 67 cm

Hip    36 inches / 92 cm

Pattern is partly cut and checked complete ( skirt pieces are uncut). Envelope has been taped down one side.

More '70s patterns here:

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