Simplicity 7766 vintage sewing pattern, dated 1968.
Misses' and Women's Dress with Detachable Neck and Sleeve Ruffles:
The A-line dress has "V" neckline, back zipper, set-in sleeves, and optional front and back waistline darts. V.1 & 2 have about wrist-length sleeves and optional self fabric or purchased belt. Collarless V.1 has top-stitching. V.2 has contrasting detachable neck and sleeve ruffles cut on bias. V. 3 with short sleeves has bias tie collar.
Bust 36 inches / 91 cm
Waist 27 inches / 69 cm
Hip 38 inches / 97 cm
Pattern is UNCUT and factory folded. Envelope is in good vintage condition, with some spotting.
More '60s patterns here: