Simplicity 6215 Vintage Sewing Pattern, dated 1984. 

Misses' Chemise Dresses:

Loose-fitting dresses have inside pockets concealed under oversized hip pockets, self band detail and dropped armholes. V. 1 has back button closing. V. 2 has short sleeves. 

Sizes 10 - 12 - 14:

Bust    83 - 87 - 92 cm (32 1/2 - 34 - 36 inches )

Waist  64 - 67 - 71 cm (25 - 26 1/2 - 28  inches)

Hip      87 - 92 - 97 cm (34 1/2 - 36 - 38 inches).

Pattern is UNCUT and factory folded. Envelope has light shelf wear, and a store stamp on the front.

More 1980s patterns here:

http://allthepreciousthings.com/collections/1980s