US Mint Information

So Just When Did Single-Squeeze Hubbing Begin?

by Ken Potter—NLG June 25, 2006 So just when DID single-squeeze hubbing begin in the US?  It’s a darn good question and the answer is a bit clouded.  However, until lately, in spite of your webmaster for years repeatedly stating that it started in 1985 or 1986, (Fiscal Year 1986), everybody else kept quoting 1997 […]

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Rockwell Hardness Test Marks On Lincoln Cents

By Pete Apple The correct degree of hardness is a critical factor in the minting of coins. If an unstruck planchet is too hard the image pressed on the coin will not be clear. If it’s too soft, the coin will wear too quickly. The U S Mint uses a Rockwell Hardness Test on all […]

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