Mint-made errors 5 centavos. Foreign coins struck on a U.S coin planchet or vice versa are very uncommon and hold a high value. Authentic error coins should not be confused with coins that are damaged after being minted, which is known as post-mint damage (PMD) or post-strike damage (PSD). Mints purchase long strips of metal which are fed through blanking machines that punch out disks known as blank planchets (or simply as planchets or blanks) on which coins are struck. This determines the size and shape of eventual coins. The punched disks are first known as "type-1 blanks (or planchets)". The disks
Blanks and Postage Blanks and Postage Blanks and Postage (often abbreviated B&P) is a method of acquiring recordings, typically live music, by mailing blank CD-Rs or DVD-Rs and a self-addressed stamped envelope to an experienced trader. The trader copies the desired recordings to the discs and mails them back in the envelope, receiving nothing for the service. B&P offers are most frequently found on internet music forums and are usually intended for those who wish to obtain live recordings but have few of their own to trade. The increased use of broadband and peer-to-peer file sharing applications such as BitTorrent has made B&P