Butterick 3580 vintage sewing pattern, dated circa 1970s. 

Girl's Jumper or Dress:

Loose-fitting jumper or dress one inch ( 2.5 cm ) above mid knee has scooped front and back neckline, cut away armholes, elasticized waistline and patch pockets. Topstitching. Purchased top.

Size    12:

Bust    30 inches / 76 cm

Waist  25 1/2 inches / 65 cm

Hip     32 inches / 81 cm

Pattern is cut and checked complete. Envelope is in very good vintage condition.

More '70s patterns here:

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