McCall's 6905 vintage sewing pattern ©1979.
Dress and Slip or Slip-Dress.
Pullover dress has front collar, lapped bodice, elastic in waistline casing, left side slit; extended shoulders are open below gatherers. Slip or slip dress has slight front gathered, spaghetti straps, left side slit. Slip many be snapped to dress above slit. Purchased belt.
Size 12:
Bust 34 inches / 87 cm
Waist 26 1/2 inches / 67 cm
Hip 36 inches / 92 cm
Pattern is uncut and factory folded. Envelope is in very good vintage condition, with light paper tanning and spotting.
More '70s patterns here:
https://allthepreciousthings.com/collections/1970s