Simplicity 6999 vintage sewing pattern, dated 1975.

Dress or Jumper in Two Lengths and Shirt-Jacket in Women's and Half Sizes ... Look Slimmer:

The long or regular length dress or jumper has low round neckline, back zipper and may be worn with self fabric tie belt. The shirt-jacket with shirt type collar has front button closing, long set-in sleeves gathered to buttoned cuffs and curved slits in side seams.

Sizes  16 1/2:

Bust   99 cm ( 39 inches )

Waist 84 cm ( 33 inches )

Hip    104 cm ( 41 inches ).

Pattern is partly cut and checked complete. Envelope is in good vintage condition, with light shelf wear.

More '70s patterns here:

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