Simplicity 6590; ©1966; One-Piece Maternity Dress in Misses' Sizes: Dress with bias roll collar, back zipper and "let-out side seams" has optional opening in front insets thru which self tie belt may be worn. V. 1 has below elbow-length set-in sleeves. V. 2 has short set-in sleeves. V. 3 is sleeveless.