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The Porsche 911 GT1 '98 "Straßenversion" is a street-legal racing car and a one-off of the racing version, that succeeded at the 24 Hours of Le Mans in 1998.

A one-off is something made or occurring only once, independent of any pattern.[1] First used in 1934,[2] this term is employed to differentiate singular items from those in a series: e.g. "the Lincoln Futura was a one-off". It has been suggested that it is a misspelling of "one-of", but this etymology is not supported by sources such as the Oxford English Dictionary.[3]


  1. Cordelia Hebblethwaite (27 September 2012). "Britishisms and the Britishisation of American English". BBC News Online.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. New York Times: The Origins of ‘One-Off’, 2 July 2010