Simplicity 5073 vintage sewing pattern, dated 1972.
Misses' Mini Tent Dress.
The mini tent dress gathered to yoke has back zipper, high round neckline, set-in sleeves and optional purchased belt. V1 with contrasting yoke has contrasting short sleeves over long sleeves gathered with elastic casings. V 2 has short sleeves.
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 a small tear at top front corner, wear to corners, paper tanning.
More '70s patterns here:
http://allthepreciousthings.com/collections/1970s