It's the same brand and style/cut as the jacket that Marlon Brando wore in The Wild One: Schott's Perfecto 618. Schott is a small family business based in New York and they were super nice on the phone when I called to figure out if I had a 618 or a 613. It was so old that most of the defining features had worn away.
Edited to add: Ooo! I just discovered that there's an inside pocket! Hell yes.