Simplicity 1901; ©1957; Girl's One-Piece Dress With Detachable Collar & Cummerbund: Pert dress has lady-like look for school or parties. V.1 & 2 have high round necklines, gathered skirts. V.2 & 3 are sleeveless. V.1 has short set-in sleeves, wide detachable collar, tie at neckline, band trim. V.2 has contrast cummerbund, bow trim and binding. V.3 has slightly lower neckline with wide collar, ribbon trim and belt.