<prompt> Leo Amberg 23 March 1912 - 18 September 1999 aiva Swiss nyanzvi mugwagwa bhasikoro racer. Iye anonyanya kuzivikanwa nokuda kwemenduru yake yebronze mu1938 UCI Road World Championships  <response>: . Akanga ari Swiss National Road Race champion muna 1937 na1938. Akatasvawo muTour de France ya1947. 