Butterick 3918 vintage sewing pattern, dated circa 1970s.

Misses' Maternity Top, Pants:

Loose-fitting, slightly flared top has pointed or rounded notched collar, shaped front and back yokes, full length sleeves gathered into buttoned cuffs, and front buttoned band closing. With topstitch trim or purchased piping and embroidery. Slightly flared pants have elasticized waistline. Transfer and instructions included for embroidery. Purchased turtleneck and scarf. 

Size 12:

Bust  34 inches / 87 cm

Waist 26 1/2 inches / 67 cm

Hip    36 inches / 92 cm

Pattern is UNCUT, factory folded. Envelope has wear to edges, corners and flap, paper tanning, writing on the front.

More '70s patterns here:

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