Butterick 3647 vintage sewing pattern, dated circa 1965. 

One-Piece Dress. 

Semi-fitted, A-line dress with V-neckline, pockets in darts.  (A) Long sleeves, contrast collar, cuffs and tie.  (B) Sleeveless dress with self ruffle and bow trim.  

Size   12:

Bust   32 inches / 81 cm

Waist 25 inches / 64 cm

Hip    34 inches / 86 cm

Pattern is UNPRINTED and checked complete. Envelope is in very good vintage condition, with some light spotting.

More '60s patterns here:

http://allthepreciousthings.com/collections/1960s