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Message:: [QUOTE="Clawcoins, post: 3732290, member: 77814"]FYI, for zincolns this is the only coin where the US MINT receives a blank.  In all other instances the US MINT receives stock of rolled sheet metal from suppliers.  But the US MINT has been researching/reviewing the possible outsource of this process too.[ATTACH=full]1000746[/ATTACH] Thus the suppliers guarantee the thickness and quality of the metal stock, and thus the resulting weight of the blank, planchet and coin.  Of course quality checks are done along the process and any not meeting the guidelines, are disposed of.  But the quality check is not each and every coin, it is batches. you can watch this to see more info which only shows a couple "exciting" parts of the minting process ==>[MEDIA=youtube]HRpRz2P4l2g[/MEDIA] and notice at the end how many quarters have a very shiny surface, where as many others are more dull.  They just came out that way ...[/QUOTE]