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