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Antonio Abertondo (August 1, 1918 – July 6, 1978) was an Argentine long-distance swimmer. He was the first person to complete a two way swim of the English Channel. He completed the swim on 21 September 1961 in 43 hours 10 minutes, with just a 4-minute rest in France. He also swam the English Channel on three other occasions, in 1950, 1951 and 1954.