C&W Georgetown :

 

this is their voice mirror, as heard in 1971 (rb)
in 1974, they announced their transmitter site additionally (rb)

 

this verification letter from 1971 was one of the first 'breaking' the C&W rule of not confirming anything (rb)
here then the 'official' folder issued for all Cable & Wireless stations (Andy Schmid, 1973)

 

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Callsigns:
8RB **

 

Frequencies Voice:
2753.7
3995
5100
5925
6855
7945
9095
9445
10528
16072.5
16456