This vintage jacket was made in the 1940s. Similar to the USAAF B-9 jacket, but with extra length, I believe this was USN issue. It features a wartime Crown zipper, a mouton hood and throat latch, buttoned epaulettes, and a quilted lining. There are two rows of stitching overtop the lining which appear to have been added later.
Chest (pit to pit): 24″ (doubled = 48″)
Shoulder to shoulder: 18″
Sleeve (shoulder to cuff): 24-1/2″