http://www.gbstamp.co.uk/directory/ Recently added Copyright: (C) Stamp Directory Browse a wide range of offers for Great Britain perfin stamps, perfin collections and perfins on covers. http://www.gbstamp.co.uk/eBay/bid.php?q=perfin Wed, 14 Jul 2010 15:04:38 -0400 As this page explains, the term perfin is formed from the beginning of the words perforated initials and perfins were usually used as a security measure. http://www.useless.connectfree.co.uk/perfin/perfin.htm Wed, 14 Jul 2010 15:03:15 -0400