All Winners
2018
Ryan Bancroft
United States
2015
Tung-Chieh Chuang
Taiwan
2012
Rafael Payare
Venezuela
2009
Joshua Weilerstein
United States
2005
Mei-Ann Chen
United States
1998
Seikyo Kim
Japan
1995
Jan Wagner
Venezuela
1992
Jin Wang
Austria
1989
Fabio Mechetti
Brasil
1986
Kazufumi Yamashita
Japan
1983
Claus Peter Flor
Germany
1980
Maximiano Valdes
Chile
1977
Philip Greenberg
United States
1974
Gotthard Lienicke
1971
Winston Dan Vogel
United States
1968
Avi Ostrowsky
Israel
1965
Ralf Weikert
Austria