Adolf Hitler in a business suit

This portrait of Adolf Hitler is presumably from the early 1930s, but the date and photographer are unknown. (The image comees from the U.S. Library of Congress, Prints and Photographs Division, digital number cph 3a48970.) Judging by Hitler's suit, we're going to guess the early 1930s, before he adopted military outfits during World War II. He does seem to have a leather strap over his shoulder here, so this is probably the brown suit he wore as the head of the Nazi Party.