Simplicity 6920 vintage sewing pattern, dated 1966.

Misses' One-Piece Dress:

The slim dress with Peter-Pan collar has back zipper and set in sleeves. V. 1, 4 and 5 have long sleeves gathered to buttoned cuffs. V. 1, 2 and 3 have box pleated and tucked front. V. 2 and 5 have optional purchased belt. V. 2 and 3 have short sleeves. V. 3 has gathered lace edging trim. V. 4 has contrasting collar, cuffs and front trim with buttons. 

Size  12:

Bust  32 inches / 81 cm

Waist 25 inches / 64 cm

Hip    34 inches / 87 cm

Pattern is PRINTED, cut and checked complete. One area of tissue has some damage from a tracing wheel ( see photo). Envelope is in very good vintage condition, with light wear and spotting.

More '60s patterns here:

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