Simplicity 6857 vintage sewing pattern, dated 1985.

Maternity Easy-to-Sew Pants, Shorts, Dress, or Top in Misses Sizes:  

Dress V. 1 and Top V. 2 or 3 or 4 with front and back gathered to yokes has shoulder button closing.  V. 1 with optional ribbon trim and V. 2 has cap sleeves and patch pockets.  V. 3 and 4 has topstitched side seam pockets and elbow-length sleeves which can be rolled up (wrong side of fabric will show) V. 3 has ribbon trim.  V. 4 has lower casing with drawstring.  Pull-on and shorts have elasticized waistline casing and front stretch panel.

Size 12:

Bust 34 inches / 86 cm

Waist 26 1/2 inches / 67 cm

Hips 36 inches / 91 cm

Pattern is UNCUT and factory folded. Pattern envelope is in good vintage condition.

More vintage maternity patterns here:

http://allthepreciousthings.com/collections/maternity