Style 3901 vintage sewing pattern, dated 1972. 

Sleeveless Cardigan in Two Lengths, Dress or Tunic and Trousers in Half-Sizes:

Lined sleeveless cardigan with center back seam has shaped "V" neckline, front button and braid loop fastening and top-stitched trim. Dress or tunic with bias neck tie has back zipper and long set-in sleeves gathered into buttoned cuffs. Trousers have elastic thru waistline casing. 

Size    10 1/2:

Bust    84 cm / 33 inches 

Waist  69 cm / 27 inches

Hip      89 cm / 35 inches

Pattern is partly cut and checked complete. Envelope is in good vintage condition, with wear and tear to corners, light spotting in places.

More '70s patterns here:

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