BID 470 is the cryptographic outfit for INMARSAT . Brahms and Brere are basically the same device. Brahms was a BID/470/1V1 and the Brere was BID/470/21.
|BID 470/1V1 is a portable unit fitted into a brief case while the 470/21 is the static office version. Both were interoperable with each other. (Photo courtesy Facebook/GCHQ)|
2) Crypto Bloke