Halfdan Nielsen
Encyclopedia
Halfdan Nielsen was a Norwegian speedskater
Long track speed skating
Speed skating is an Olympic sport where competitors are timed while crossing a set distance. It is also a sport for leisure. Sports such as short track speedskating, inline speedskating, and quad speed skating are also called speed skating...

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He was the second registered world record holder in 10,000 m, when he improved Oskar Fredriksen
Oskar Fredriksen (speed skater)
Oskar Fredriksen was a Norwegian speedskater.In 1890 he became the first registered world record holder in the 5,000-meter race. He did it again in 1893 in the 10,000-meter race. In 1894 Fredriksen set a world record in the 500-meter race with a time of 47.8 seconds.-References:...

's record in Stockholm in 1893.
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