Simplicity 3568, from 1960, printed in Great Britain.
Dress with Detachable Collar and Cuffs. Dress has back button closing, set-in sleeves, softly pleated skirt, and shaped trim sections stitched in side seams. V 1 has collar, long sleeves gathered into buttoned wristbands and rick-rack trim. V 2&3 have short sleeves. Trim ties at center front. V 2 features contrasting detachable collar and cuffs. V 3 has top-stitching and contrasting trim sections.