Army Buenos Aires :

 

a call in voice and telegraphy (Tony Paredes)

 

look at this friendly letter received by Lars Lundström in 1979
Maarten van Delft received 2 quite different QSLs, this one from 1993...
...and this one from 1998, all letters with cards from associated LU1ARM

 

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Callsigns:
LSE***
LTA **
LTR**

 

Frequencies Voice:
3390
4470
4490
5240
5370
5400
5650
7720
7976
8075
8098
8980
9081
10490
11055
13365
14370
14402.5
14436
14450
15780
15820
20146
20275
20276
29810

 

Frequencies Morse Telegraphy:
3390
10675

 

Frequencies Radioteletype:
5400
20148.2

 

Systems used:
50 Bd
SITOR