Some dimes can be worth serious dough.

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If you have a rare 1894-S Barber Dime, congratulations -- you're sitting on nearly $2 million! According to Coin Values, the dimes were made as gifts for friends of the San Francisco mint superintendent.

A 1907 Barber Dime on an old and faded yellow envelope and a green textured antique book.

Credit: skhoward

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Credit: skhoward

Only two are in circulation, so the chances of you finding one are slim. But if you get your hands on one, you’ll be pleased to know it’s worth a whopping $1.9 million.

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While the 1894-S is by far the most valuable dime, it’s not the only one that’s worth a gold mine. Some dimes produced during the 18th and 19th centuries can fetch hundreds or even thousands of dollars, from the 1829 curl base “2” Liberty Cap Dime (worth $7,750) to the 1895-O Barber Dime (worth $385).

How do you know if your dime is old enough to be valuable? Here’s a hint -- it probably won’t feature Franklin Delano Roosevelt, who was president in the middle of the 20th century. While one so-called “Roosevelt Dime” (the 1968-S, no-S proof) is worth about $7,500, your run-of-the-mill, modern-day dime is likely worth a mere 10 cents.

Before Roosevelt became president, dimes featured "an impression emblematic of liberty," per the U.S. Mint.

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State Sen. Marty Harbin (R-Tyrone) speaks during a state Senate Ethics Committee hearing on election security at the Paul D. Coverdell Legislative Office Building in Atlanta on Wednesday, November 1, 2023. Harbin is the main sponsor of SB 120, which would withhold state funding or state-administered federal money to any public school or college that implements DEI policies. (Arvin Temkar / arvin.temkar@ajc.com)

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