Simplicity 5012 vintage paper sewing pattern, dated 1973. 

Misses' Dress in Two Lengths with Sleeve Interest ... Young Contemporary Fashion:

The dress with front tucks has back zipper, square neckline, self fabric tie ends and set-in sleeves. V. 1 and 2 are mini length. V. 1 with armhole ruffle over long sleeves gathered with elastic casings forming self ruffles is body lined when made of sheer fabrics. V. 2 has short sleeves and embroidered eyelet edging trim. Ankle length V. 3 has short sleeves gathered with elastic casings forming self ruffles. 

Size  12:

Bust  34 inches / 87 cm

Waist 26.5 inches / 67 cm

Hip    36 inches / 92 cm

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