This vintage mackinaw coat was made in the 1930s by Double Duty. It is double breasted, with handwarmer pockets, flapped cargo pockets and a belted back. As was common of work coats of this period, it is unlined.
Chest (pit to pit): 21-1/2″ (doubled = 43″)
Shoulder to shoulder: 19-1/4″
Sleeve (shoulder to cuff): 24-1/4″