no recordings available
a nice PPC from the collection of Lars Lundström (1975),
certainly a very rare one
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Callsigns:
GMP
Frequencies Morse Telegraphy:
4632.5
9200
10390
15738
Frequencies Radioteletype:
2840
4632.5
4837.5
5208
6905
7401
9200
10295
18190
Systems used:
50 Bd
SITOR