Up for your consideration one US 921 First Day of Issue (November 2, 1944) Flag of Korea.

US 921 is part of the Overrun Countries Series, which honors each of the nations invaded by Axis powers during World War II. It pictures the flag of Korea, which features the Chinese Yin and Yang symbol and four symbols representing the Taoist philosophical ideas of the universe – harmony, symmetry, balance, and circulation.

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