The 20-cent coin is a unique and rare denomination that was issued in the United States and later in the Philippines under U.S. sovereignty. The U.S. minted 20-cent pieces primarily in the late 19th century, with the 1875-1878 series being its most notable. The 1929 coin from the Philippines reflects the American influence during its territorial control and is considered collectible among numismatists. The unknown status of certain coins, particularly in terms of mintage or historical significance, can increase their appeal among collectors, as it may suggest rarity or potential for appreciation in value.

Item Denomination Series Year Mint
1929-- (Unknown) Philippines Under U.S. Sovereignty 20¢ (Twenty Cents) Philippines Under U.S. Sovereignty 1929 Unknown