Here is Butterick Pattern # 3615 UNCUT Junior/Misses Long Halter Dress Jacket Size 13/14 Bust 33 ½.
Semi-fitted and flared halter dress in evening length has U-neckline with buttoned closing in back. Semi-fitted jacket gathered into midriff band extending into ties has slightly rounded collar and full length sleeves elasticized at the wrists.
The pattern and instructions are still factory folded. The envelope shows some age, wear and creases from storage.