Ho-Chi-Minh-Ville Aero :

 

here is a recording, where Ho Chi Minh is working with a korean flight (well, not personally...) (rb, 1985)

 

no pictures of QSLs or other info available

 

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Callsigns:
VVTS
XVZ

 

Frequencies Voice:
3845
5536
5655
8840
8942
11396
13309

 

Frequencies Radioteletype:
3735
5315
5853
7637
7863
7975
8074
8141
10145
12065
12096
14495
14498

 

Systems used:
100 Bd
50 Bd