Simplicity 6457 vintage paper sewing pattern, dated 1966.

Teen's One-Piece Dress in Two Lengths: 

Dress with scooped neckline and back zipper has an A-line skirt, empire waistline and set-in sleeves. V. s1, 2, 3 & 5 are regular length. V. 4 is ankle length. V.s 1 & 2 have long sleeves. V.s 3, 4 & 5 have short bell sleeves. V. 1 has contrasting ribbon trim. V. 2 has braid trim. V. 3 has lace edging trim. V.s 4 & 5 have lace edging or braid trim. V. 5 has contrasting skirt. 

Size   16T:

Bust   36 inches / 92 cm

Waist 28 inches / 71 cm

Hip    38 inches / 97 cm

Pattern is unprinted tissue, checked complete, in good condition. Envelope has some wear and tear at the opening.