CREATE TABLE table_76281 ("Season" FLOAT, "Date" TEXT, "Winner" TEXT, "Score [C ]" TEXT, "Venue" TEXT, "Competition round" TEXT)

Who was the winner on 15 December 1957?
SELECT "Winner" FROM table_76281 WHERE "Date" = '15 december 1957'
SELECT "Winner" FROM "table_76281" WHERE "Date" = '15 december 1957'