King Albert I (ruler of BELGIUM since 1909-12-23) | Reichpresident Paul von Hindenburg (ruler of GERMANY since 1925-05-12) | President Niceto Alcala-Zamora y Torres (ruler of SPAIN since 1931-12-11) | President Paul Doumer (ruler of FRANCE since 1931-06-13) | Regent Miklos Horthy de Nagybanya (ruler of HUNGARY since 1920-03-01) | King Victor Emmanuel III (ruler of ITALY since 1900-07-29) | Emperor Hirohito (ruler of JAPAN since 1926-12-25) | President Pascual Ortiz Rubio (ruler of MEXICO since 1930-02-05) | Queen Wilhelmina (ruler of NETHERLANDS since 1900-01-01) | President Oscar Carmona (ruler of PORTUGAL since 1926-07-09) | Chiang Kai-Shek (ruler of CHINA since 1928-10-10) | King George V (ruler of UNITED KINGDOM since 1910-05-06) |