Even though it is slightly furled at the stern of the ship,, when it is blown lightly by the breeze, American Flag on the ship has fifty stars, as the US Flag does now, and did in about 1990 when this was filmed, but that flag was not adopted until Monday, July 4, 1960. The flag that should have been shown, which was current in 1931 was the forty eight-star Stars and Stripes, which was valid from Thursday July 4, 1912 to Friday July 3, 1959, and is even seen hanging high in Grand Central Station in Hitchcock's North by Northwest.