This is a gorgeous bright yellow suit by Ben Zuckerman, which dates from the early 1960's. It is made of a nubby wool, trimmed in a matching yellow satin. The jacket is more 'casual' as it is collarless. This suit was probably worn in the spring and summer and is lots of fun!
Photos courtesy of The Window Lady.
https://www.etsy.com/uk/shop/thewindowlady?ref=l2-shopheader-name

Carmen in smoky charcoal suit of British wool tweed, tunic jacket is collarless and belted in black kidskin, by Ben Zuckerman, hat by Emme, photo by Saul Leiter, Harper's Bazaar, September 1959

From Vogue, 1 September 1959-

'Immediate Suiting: Coppery Tweed $265- This up-to-date tweed shows its true metal in city surroudings. Its new tawny colouring is on the coppered side. Its shape, thanks to Ben Zuckerman, is a triumph of long, trumpeting line, deep crushed-leather belting, and wide spread collaring. In French Wool tweed, also solid black English tweed. Size 10-16.'

Compare with this suit- which I believe is the above mentioned black tweed version.

From Harper's Bazaar September 1959-
Carmen in a smoky charcoal suit of British wool tweed, tunic jacket is collarless and belted in black kidskin, suit by Ben Zuckerman, hat by Emme.

From Vogue Magazine- Mary McLauchlin in a black silk crepe chemise dress marked with a bow by Ben Zuckerman, hat with black veiling and jewelled feather by Adolfo for Emme, Andrew Geller shoes. Photo by Karen Radkai in the Whitney Museum, 1 February, 1958.

This lovely suit, in a vibrant pink would brighten anybody's day. The suit is wonderfully tailored and has a very heavily beaded collar to add a luxurious touch.
Photos courtesy of Off Broadway Vintage.

This jacket is a perfect example of very fine tailoring. The jacket is made of very high quality wool in neutral grey. The jacket is double breasted with corde buttons and perfectly set collar and sleeves. It's wonderfully well made and would have taken a great deal of skill to make.

Photos courtesy of Vintage 201.