Butterick 4126 vintage sewing pattern, dated 1976.

Misses’ Dress, Top & Pants.

Loose-fitting, A-line dress in below mid-knee length or top, gathered into shaped front and back yoke, has wing collar, front neckline slit, with above elbow or three-quarter length sleeves with turned back cuffs and gathers at caps, pockets in side seams, and topstitch trim. With or without purchased belt. Straight-legged pants, without side seams, are darted into waistband. 

Size  12.

Bust  34 inches / 87 cm

Waist 26 1/2 inches / 67 cm

Hip    36 inches / 92 cm

Pattern is UNCUT and factory folded. Envelope has spotting, wear and a handwritten name on the front.

More '70s patterns here:

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