ARRL Diamond DXCC Challenge
2012 is the 75th anniversary of the ARRL’s DXCC Award–the world’s preeminent DXing award continues to be DXCC, so reaching the “Diamond milestone” is an event that we all want to celebrate. Going back to the roots of the award, and specifically reading the 1937 DXCC List (January, 1937 QST pages 52-3), we can learn what countries were counted at the onset led us to create the Diamond DXCC Challenge.
More at ARRL website