The SWL QSL Card Museum Czechoslovakia Europe Radio Journal OLR Collection - 1936, 1937, 1938 Radio Journal - OLR-4A -1937 Radio Journal - OLR-4B -1938 Radio Journal - OLR-2A -1938 Radio Journal - OLR-2B -1938 Radio Journal - 1938 QSLs Courtesy of Kermit Geary (USA)