Simplicity 4431 vintage sewing pattern, dated circa 1960s.
Misses Dress:
Dress has round collarless neckline and back zipper closing. Slim skirt has soft pleats in front and kick pleat in back. Belt may be self or purchased. View 1 has short set-in sleeves. Sleeveless View 2 has square shaped detachable collar with middy braid and button trim. Collar has back closing.
Size 12:
Bust 32 inches / 81 cm
Waist 25 inches / 64 cm
Hip 34 inches / 86 cm
Pattern is unprinted, unused and factory folded. Envelope has age tanning and light wear around top end.
More '60s patterns here:
http://allthepreciousthings.com/collections/1960s