The SWL QSL Card Museum Switzerland Europe League of Nations / Radio-Nations - 1936, 1937, 1938 League of Nations / Radio-Nations - Geneva - HBH - 1937 League of Nations / Radio-Nations - Geneva - HBJ -1937 League of Nations / Radio-Nations - Geneva - HBO -1938 League of Nations - HBQ - 1938 QSLs Courtesy of Kermit Geary (USA)