The SWL QSL Museum Poland Europe Polskie Radio Warsaw - (1936 - SPW) - (1938 - SP19,SP25,SPD,SPW)  Courtesy of “Radio Heritage Foundation, Dave Thomas” (USA) Polskie Radio Warsaw - SP19 - 1938  Courtesy of “Radio Heritage Foundation, Dave Thomas” (USA) Polskie Radio Warsaw - SP25 - 1938    Courtesy of “Radio Heritage Foundation, Dave Thomas” (USA) Polskie Radio Warsaw - SPD - 1938   Courtesy of “Radio Heritage Foundation, Dave Thomas” (USA) Polskie Radio Warsaw - SPW - 1938     Courtesy of “Radio Heritage Foundation, Dave Thomas” (USA)