This is a 1950's Zuckerman suit that is perfection! It features a large shawl collar and has  a sash belt. The fabric is really interesting- it is like a windowpane plaid but in solid black.

As is typical with Zuckerman, the buttons are very high quality and are a feature of the suit.

I believe this suit dates to 1954- as this is when Christian Dior showed the 'H'-line. A similar suit, called Precieuse, worn by Marlene Dietrich, featured a jacket with a peplum, a belted tie waist, and a slim fitting straight skirt. It isn't surprising that Zuckerman would echo Dior, as his designer, Harry Shacter, was considered an important customer at Dior. He was known to have a photographic memory and could later sketch the models he would see at the Dior show. 

Photos courtesy of Enokiworld.