The Rare Dimes That Could Be Worth A Ton Of Money (And How To Tell)

Although some errors on U.S. coins can be difficult to spot, the overdate on the 1942/1 Mercury dime (Winged Liberty Head) is more obvious: The 1942 date appears over remnants of 1941 in two noticeable ways. First, remnants of the "1" are visible around the "2," while the "4" also shows noticeable doubling. The Philadelphia 1942/1 variety generally displays a more obvious overdate than the 1942/1-D variety minted in Denver.

About 315 million 1942 Mercury dimes were minted across the Philadelphia, Denver, and San Francisco Mints. To identify the Mercury dime, look for a coin depicting a young Liberty facing left and wearing a winged cap. On the back, the fasces (a bundle of rods surrounding an axe) represents strength and unity, while the olive branch represents peace. IAs of August 2026, a Mercury dime's silver melt value is about $4.80, depending on the current price of silver. Even junk coins can be worth more than face value if minted before 1965 because of their silver content.

The value of one of these overdate Mercury dimes is far beyond the five cents that it costs to make a dime, the 10-cent face value, and the melt value because of the silver. In August 2026, USA Coin Book listed a range of values depending upon condition. A Good (G-4) 1942/1 Mercury dime has an estimated value of $379, while an uncirculated MS-65 example is valued at a whopping $18,710.  

By this era of money production, overdate errors were rare. However, in late 1941, mint workers were preparing dies for both 1941 and 1942 coins in Philadelphia, and two dies ultimately received both dates. One of these dies was reportedly sent to Denver, resulting in both Philadelphia and Denver varieties of the 1942/1 overdate. This backstory adds another layer of interest for collectors. Combined with collector demand, the relative scarcity of the overdate can make these dimes significantly more valuable than ordinary 1942 examples. So, in short, finding an error coin can earn you money.

This coin is often counterfeited, either through date alterations on genuine 1942 Mercury dimes without original errors or via straightforward counterfeits, so use due diligence. This can involve working with a professional numismatist to verify the authenticity and value of a coin you own or are considering buying.

Here are a few asking prices to use as benchmarks. Note that these are listings, not confirmed sales at the listed prices. On eBay in August 2026, three listings offered real-world examples of 1942/1 Mercury dimes. One dime graded XF 45 by Numismatic Guaranty Company (NGC) was listed for $950. Another example with the same grade was listed for $1,225, while an ungraded example had an asking price of $1,895.