The Cass Awards are given annually to DXpeditions making the most unique QSOs in a calendar year and are announced in March. There are two categories, single operator and unlimited. "Cass" was WA6AUD (now SK), Hugh Cassidy, aka Professor Cass, who was the editor, printer and mailman for the West Coast DX Bulletin,
Video announcement 7O73T Socotra Island, IOTA AF - 028, Yemen. Op - RA9USU.
https://youtu.be/Km1l1-dRuL8?si=uIXohl9O7N99YtA7
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7O73T Socotra Island Yemen