This vintage coat was made in the 1940s or 1950s, and was sold by Sears under their Fieldmaster label. It as a canvas shell, with slash handwarmer pockets and flapped hip pockets. Both have leather reinforcement at the corners. As was typical with this style of coat, there are loops instead of butonholes. The collar is black mouton, the lining is sheepskin. The sleeves have a quilted lining. Although this coat was made in the ’40s or ’50s, the style had been around basically unchanged since the turn of the 20th century. They were popular as workwear for men who worked outdoors- for whom a coat that was lightweight yet warm, and which was rugged was a must.
The reinforcements are very similar to what was on the Montgomery Ward coats of the same era. Possibly the same maker? https://vintagehaberdashers.com/2013/03/14/powr-house-shawl-collar-mackinaw/
This one is also quite similar: https://vintagehaberdashers.com/2012/05/23/shawl-collar-mackinaw/
Chest (pit to pit): 22″
Shoulder to Shoulder: 18″
Sleeve (shoulder to cuff): 24″