HI TODAY YOUHAVE THE OPPORTUNITYTO OWN A VERY RARE 1939MANX NORTON 500cc SOME PEOPLE KNOW THIS AS A MANXMANI BELIEVE THIS TO BE WORKS MACHINEBUT I HAVE NO PROOF OF THISTHE ENGINE IS A DOUBLE OVER HEAD CAMWITH MAGNESIUM CASESIT STARTS AND RUNS WELLANY QUESTIONS PLEASE CALL BRIAN O