Simplicity 8760 vintage sewing pattern, dated 1970.  

Maternity Dress in Two Lengths, Jumper and Pants in Misses' Sizes:

The regular-length or the mini-length maternity dress softly gathered to front yoke has back zipper, collar, long set-in sleeves gathered with elastic casings forming self ruffles and optional daisy medallion trim. The dress may be worn under jumper or with pants. The mini-length dress has self fabric tie belt. The sleeveless and collarless jumper with front dart interest, high round neckline, front button closing and patch pockets may be worn as a sleeveless dress. The pants have elastic waistline casing and front stay of jersey or a purchased stretch panel may be used. 

Size   18:

Bust   40 Inches / 102 cm.

Waist 31 inches / 79 cm

Hip    42 inches / 107 cm

Pattern is cut and checked complete. Envelope has wear and tear to corners and opening.

More '70s patterns here:

http://allthepreciousthings.com/collections/1970s