Simplicity 6861 vintage sewing pattern, dated 1975. 

MISSES' BOLERO AND SKIRT:

The bolero has optional top-stitching of matching or contrasting thread. The flared skirt with back zipper and waistband has optional top-stitching of matching or contrasting thread. 

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. Envelope is in good vintage condition, with a small cut across top corner.

More '70s patterns here:

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