CPRM Lisboa :

 

listen here to this marker for a radiotelegraph circuit (rb, 1974)
here is one of the rare cases, where you have a station with a music mirror giving an ID (rb, 1974)

 

a friendly verification letter from 1972 (rb)
here is a nice QSL card from the collection of Frank Schüttig (1978)

 

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Callsigns:
CUA **
CUC **

 

Frequencies Voice:
4020
4767
5357
7805
8010
9060
9117
9150
9192
9195
9945
9990.5
9994
10175
10485
10555
10905
10955
12085
12198
13970
14450
15665
15890
15900
15957
16387.5
16388
16394
18685
18815
19100
19115
19132
19164
19180
19275
20695
20765
20877
21796
21870
22795
23817
24195

 

Frequencies Morse Telegraphy:
7665
9419
9991
12260
13420
15833
19110
19814

 

Frequencies Radioteletype:
5455
5765
5816
8177.5
9097.5
11445
13380
13400
13420
15815
15890
16281
16388
19115
19164
20765

 

Systems used:
50 Bd
ARQ-M2-96