Butterick 2137 vintage sewing pattern, dated circa 1961. 

Miss Princess Sheath.

(A) Princess sheath dress with off-the-neck round contrast collar (trimmed to match dress), set in below-elbow sleeves. (B) Shallow neck version with short sleeves, no collar. (C) Sleeveless version with self-banded jewel neckline. 

Size  12:

Bust  32 inches / 81 cm

Waist 25 inches / 64 cm

Hip    34 inches / 86 cm

Pattern is UNPRINTED, perforated tissue and is checked complete. Envelope is in very good vintage condition.

More '60s patterns here:

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