These short-wave radios were both used as communication tools between intelligence services and their agents. The agents would know what band to tune in and at precisely what time a message would be transmitted. These messages, usually using some sort of code, would serve to relay instructions or warnings to the agent. The "Grundig" was used by a friendly intelligence service working on a joint operation with the Service against a hostile service. The "Barlow Wadley" was used by the agent(s) of a hostile service in Canada.

Short-wave radios. A Grundig short-wave radio.

Short-wave radios. A Barlow Wadley short-wave radio.