SUZUKA, April 2 -- When Canadian collector Darren Jack discovered that an Ayrton Senna helmet he values at a million dollars was for sale in Japan, he jumped on a plane to acquire the piece of sporting history that the legendary Brazilian driver had with him during his fatal final Formula One Grand Prix.

Jack, who AFP met at the Japan Grand Prix last weekend, showed off the iconic yellow helmet in its original 'A.S.'-initialised bag, which both belonged to the three-time world champion, who was killed aged 34 in a crash at the Imola circuit in San Marino on May 1, 1994.

The Bell helmet is not the one Senna wore during that fatal race. But it is one of the three or four he had with him at the start of the 1994 season in Brazil, Japan and...