I have a 10 yen Coin (1971) With No Back printed on it, It is completely Flat. A\Doies anyone have any idea if its worth Anything (Anything mroe than 10 Yen) Thanks Chris
Can you post a pic? Somebody most likely shaved it off after it was minted on purpose to try to pass it off as an error or just as a curiosity.
Blank Planchet Blank Coins with No Rims If your blank coin doesn't even have the upraised rim yet, it's technically a coin blank. If it is made of silver, it is almost impossible to authenticate, but if it's clad, an expert in error coins could probably authenticate it, in which case (if authentic) it's worth maybe $50 or more. Keep in mind that a genuine coin blank will have a rough, perhaps sharp edge, and the blank may be off-color or grainy looking, depending on what part of the coin blank processing phase it was in when it left the mint. Beware of nice, shiny looking coin blanks with no upraised rim and a smooth edge. These usually just counterfeit blanks made to deceive vending machines. Get Expert Advice About Your Blank Coin In all matters of this sort, it's best to get your blank coin looked at by an expert. You can find a local PNG Coin Dealer, or send the specimen to a specialist in minting errors for an opinion. As a third option, if you can post a photo in the Coin Collecting Forum, or describe it very carefully there, and perhaps we can provide some additional information.
Japanese error coins are extremely rare, as both the Tokyo and Osaka mints have highly efficient quality control. To manufacture a coin from a strip of coin metal, a series of round blanks are punched out. The blanks (by the thousands) then go through a step called "upsetting" where the raised rims on both sides are created, turning the "blank" into a "planchet". The planchet then goes through the dies and becomes a coin. If your Showa 46 (1971) coin were really a planchet that had been struck on only one side, the other side's rim would be raised. In all probability yours was shaved by someone - perhaps as a prelude to creating a two-tailed coin. Have you checked the weight? My bet is that it is significantly less than a genuine 10 yen's 4.5g.
