This is NOT new but the pattern is unused.  Pattern is in great condition.  Envelope is in poor condition showing age and wear.  Dated 1979.

Pattern is for misses' Sundress in size 12.  12 Pattern pieces.  Top-stitched sundress with shoulder straps or halter ties has flared skirt gathered to fitted bodice at waistline, side button closing and bodice band forming cuff.