Vintage Tuxedo Vest, Circa 1940, approximate size medium

Rare, one of a kind tuxedo vest! From 1940 with label from original owner (see photo) Beautiful waffle black silk texture. Detachable stud buttons on front. The front is in beautiful condition. There is a tear in the lining on the back. (see photos). There is no size attached to the vest but I would call it a medium based on the measurements, see photos.