The ZC1 Transceiver
Here's a really nice example
of the New Zealand manufactured ZC1
Complete with Wireless Remote
Control Unit A ZA7533(NZ) and Satchel Signal No.1T...
containing Headphones, Microphone
No3A, Morse Key and battery lead
Inside the control box on the
inside of the lid
The circuit diagram

..and finally a view of the
control box