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The 12 Metre Class was used in the Olympic Games of 1908, 1912 and 1920 but few boats participated in these events.
Johan Erik "John" Carlsson (January 5, 1870, Stockholm - July 24, 1935 Värmdö) was a sailor from Sweden, who represented his native country at the 1908 Summer Olympics in Ryde, Isle of Wight, Great Britain in the 8 Metre.