no recordings available
see this nice multi-QSL, confirming
PT-285, POZ-429,
RZE-474, O-285,
and WAO-412 (Rudi Renkwitz, 2002)
this card confirms PNO-330 and WAO-412, directly from Warszawa Airport
(Lars Lundström, 2005)
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Callsigns:
WAO
Frequencies Morse Telegraphy:
412
.