The 20-cent coin was minted in the United States in limited quantities, primarily intended for circulation in territories such as the Philippines under U.S. sovereignty. The 1938 20-cent coin is notable for its unique design and limited mintage. Coins from this era can be hard to find and are often sought after by collectors due to their historical significance and rarity. The term "unknown" may refer to the general public's lack of familiarity with this particular denomination and its role in American numismatic history.

Item Denomination Series Year Mint
1938-- (Unknown) Philippines Under U.S. Sovereignty 20¢ (Twenty Cents) Philippines Under U.S. Sovereignty 1938 Unknown