

The illustrations differ between a normal swallowtail and a tapered version. Talbot-Booth stated in 1938 that the flag had become tapered but retained older artwork in later books. Since the tapered form also appears earlier, Rosanoski leaves open whether an actual change occurred or observations of a flying flag produced the variations. Lettering differs in dots and the sizes of the ampersand and o; most sources show a small raised o after C, whereas the USA Houseflags site and FOTW omit it.