PTT Riyadh :
the voice mirror in english and arabic, recorded by Hajo Russow in 1967
friendly verification letter from 1972 (rb)
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Callsigns:
HZF ***
Frequencies Voice:
4530
4885
5280
6930
7630
7715
7805
18390
18995
Frequencies Radioteletype:
21884
Systems used:
50 Bd