This is a lovely red Ben Zuckerman suit, single breasted with a straight skirt. There is a half belt at the rear of the jacket.
You can see that this suit shown with the skirt at two lengths- it would have been very common at this time (1950's to 60's) to alter clothes from season to season, and clothing at this time would have had large seam allowances.
This suit also has a label from Alice Jane Dow, which was a high end boutique based at several locations in Michigan. By 1975 the boutique had closed.
Photos courtesy of DivineGirlDelightful.