What a pink dream of an outfit! Ben Zuckerman probably made this in the early 1960's. The dress is sleeveless and has a fitted waistband in navy. The jacket is single breasted with glass buttons and navy cuffs that give the impression of a navy blouse under the jacket- a very Chanel touch.
The colourway of this ensemble is very reminiscent of the suit worn by Jacqueline Kennedy on that tragic day in 1963, which mean it was likely made before that date.