Original: James '' Jim '' ( or '' Jimmy '' ) Clark , Jr. . OBE ( 4 March 1936 â '' 7 April 1968 ) was a British Formula One racing driver from Scotland , who won two World Championships , in 1963 and 1965 .
Simplified: Jim ( or Jimmy ) Clark OBE ( 4 March 1936 -- 7 April 1968 ) was a British Formula One racing driver from Scotland .