Simplicity 1848 vintage sewing pattern, dated 1956.

Misses' Dress in Two Lengths and Jacket:

Dress bodice is cut low in back and has pleated section at upper edge of front with bias trim. Back has trim that extends to sides and over shoulders to center back forming straps. Self-fabric or ribbon streamer-bow trims back. Skirt is gathered. Back-buttoning caraco jacket has short kimono sleeves, is lined and has a notch at front edge. V. 1 is ankle length with net overskirt. V. 2 is street length. 

Size   12:

Bust   32 inches / 81 cm

Waist 25 inches / 64 cm

Hip    34 inches / 87 cm

Pattern is UNPRINTED tissue, checked complete, in good (possibly unused) condition. Envelope has wear around all edges, paper spotting.

More '50s patterns here:

https://allthepreciousthings.com/collections/1950s