Simplicity 7027 vintage sewing pattern ©1975.

Simple-To-Sew Fashion Basic Princess Dress with Two Necklines in Half-Sizes (including a Bonus Chart..."How to Fit a Princess Dress"):

The collarless dress with princess seaming has back zipper and optional purchased belt. V. 1 has high round neckline and long set-in sleeves. V. 2 & 3 with lowered round neckline have top-stitching trim. V. 2 has short set-in sleeves. V. 3 is sleeveless. 

Size   18 1/2:

Bust  104 cm / 41 inches

Waist 89 cm / 35 inches

Hip    109 cm / 43 inches

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