This is a Ben Zuckerman jacket, once part of a suit in a grey tweed herringbone wool. It has a very equestrian feel to it and probably dates from the early to mid 1950's.
The jacket was sold at Bauer McCann, Waco Texas, which is a now defunct boutique that specialised in high end designer wear.
It is also interesting to see that this jacket was treated with the Berlou Mothproofing treatment. This was a chemical treatment applied to garments that repelled moths. Berlou was founded in 1944 but by 1986 it had gone out of business.
Photos courtesy of  Holy City Hoarders.