Simplicity 7723 vintage sewing pattern, dated 1981.
Everybody Nightshirt in Two Lengths:
Top-stitched nightshirt with contrasting collar and bands has front button closing above pleat, pocket, long set-in sleeves, and shirt tail hem. Short length View 1 has stand-up collar. Long length View 2 has shirt type collar.
Chest or Bust : 38 - 40 inches / 97 - 102 cm
Pattern is UNCUT and factory folded. Envelope has light spotting, and a store stamp on the front.