Hans Joachim Geisler

HansJoachim HaJo Geisler is a retired German swimmer who won a gold and a bronze medal at the 1975 World Aquatics Championships. He also competed at the 1972 and 1976 Summer Olympics. In 1972 his team finished fourth in the 200 m freestyle relay, 0.15 seconds short of a bronze medal. Between 1973 and 1978 he won eight national titles, including six in the 400 m individual medley event.

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Source: Wikipedia