https://www.obsev.com/g/surprisingly-valuable-coins/701755 #1 on his list: "Typically, a Lincoln Memorial penny features the word "America" with the 'a' and 'm' close together. However, if you find yourself a penny where 'a' and 'm' are wider spaced than usual, you might be able to net yourself as much as $500." More tomfoolery: He says that a silver quarter made after 1964 "could earn you up to $65". I would think it would be worth more than that... "Steel Penny In the mid-40s, the USA was trying to save copper to help the WWII effort. So they began printing pennies, usually in copper, in a silver, metallic looking steel. These can net you up to $6 if you find one." "No Mint Dime Normally, every dime has an 'S' printed on it, as a signifier of its official minted status. But some 'no S' dimes, originally just produced as proofs, wound up in circulation. And if you find one, you could nab up to $25,000. (correct me if I'm wrong, but this *only* applies to *proof* dimes minted in 1968, 1970, 1975 and 1983) "Lincoln Wheat Penny In 1958, the US Mint changed the design of pennies to the now-familiar Lincoln Memorial on the back. But until then, it had a descriptive "One Cent" typeface, alongside two stalks of wheat. If you find one of these, you could earn up to $1,000." (Again... wouldn't this be worth *more* than $1k...?) "Double Die Penny No, you don't need 3D glasses to look at this penny correctly. Some rounds of pennies were accidentally "double dyed", meaning a coin is struck twice with its imprinted messages. As you can see, it results on two layers not quite on top of each other. Double the layer, grab yourself up to $275." (So many things wrong with this one... "double dyed"..."a coin is struck twice" (no, the *die* is struck twice)... And there are so many DDOs/DDRs... he picks the 1955 Lincoln... then says a DDO is worth "up to $275"... <sigh>...) "Ben Franklin Half Dollar Normally, the half dollar coin features President John F. Kennedy. But from 1948 to 1963, a fifty-cent piece featured Mr. Kite-Flyer himself, Benjamin Franklin. If you see one of these in yoru [sic] bifocal lenses, you could earn up to $15." "Aluminum Penny In 1974, the US Mint proposed a penny made predominantly of aluminum, rather than copper, to offset the rising costs of coin production. About 1.5 million were printed, but ultimately not put into circulation. Except -- some of them made their way into people's pockets. And if you find one, it could net you a cool $1 million. (Not gonna open up this can of worms, but $1 million is wrong...) (I didn't bother finishing the article... am I wrong in pointing out any of the above blunders? Did I miss any?) Although I *do* have to give him props... I did not know about the 2008 Undated 20p in the U.K.