Simplicity 7043 vintage sewing pattern ©1975.

Misses' Jiffy Short Skirt or Jumper with Detachable Bib:

The top-stitched jumper skirt or the short skirt with patch pockets and self fabric tie ends is wrapped in back and tied in front. The jumper skirt features a matching detachable top-stitched bib with "V" shaped neckline buttoned to skirt. 

Size:   MEDIUM (12 - 14) :

Bust   34 - 36 inches / 87 - 92 cm

Waist  26 1/2 - 28 inches / 67 - 71 cm

Hip     36 - 38 inches / 92 - 97 cm 

Pattern is UNCUT and factory folded. Envelope has a store stamp, spotting, small tears. 

More '70s patterns here:

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