The Kolster Brandes CR20 is an a.c mains valve radio, which was made in 1947. It has long, medium and band spread for 19 metre & 31 metre short wave bands.
The valve line-up is as follows:-
6K8G, 6K7G, 6Q7G, 6V6, 6X5G
The appearance of the receiver makes it look more like that of a communications receiver rather than that of a usual domestic receiver