Thanks. I see this quote pretty much explains its usage on that 1940 Poster Stamp Sheet:
Quote:
The flag was officially adopted as the Flag of the Americas—in this usage representing besides Hispanic Americans also Anglo Americans, Franco Americans (the Québécois, Haitians, Guadeloupians, Martininqians, and French Guianians), Portuguese and Brazilian Lusitanic Americans, Dutch Americans (the inhabitants of the Dutch Antilles and Surinam), and Greenlanders—by all member countries of the Pan-American Conference at their Seventh Assembly in 1933.