1930s 'Adam' ("the first name in hats") fedora.
When this suit was bought back in September of 1940, the blitz of London had just begun (September 7). Hitler announced on September 17, 1940 that the planned invasion of England (Operation Sealion) was postponed.
The United States had not yet joined in the fighting and hadn't even started its 'Lend-Lease' program with England, Russia, China and other allies.
This suit was born in unsettled times.