This is a post WW2 German army guard coat/sentry coat. It's in excellent condition, showing no stains, mothing, tears, etc. I think the inside liner is made of a wool blend. It's very heavy, about 10 pounds.
Measurements are approximately 24.5 inches armpit to armpit, 21 inch shoulders, 25 inch sleeves, 48 inches from shoulder to bottom of coat.