Here is a hard to find Butterick Pattern # 6582 UNCUT Misses Dress Retro (new retro) 1960 in sizes 18, 20, and 22 (ala Mad Men style.) Semi-fitted dress, mid-calf has gathered shoulders and back zipper. A: attached bow. A,B: straight, back vent. C: flared, belt. Purchased petticoat and belt-kit.
The pattern and instructions are still factory folded. The envelope shows some wear and creases from storage.