The Bell Oscilloscope was manufactured by Bell Radio-Television Corporation Ltd in about 1960.
The photographed model belonged to an ex-Bell employee - only 100 were made. Two circuits found, both appear similar. One referred to as a 'wide band' 'scope, the other a general purpose 'scope.
Valves (7): ECF80, ECF80, ECF80, ECF80, ECC81, DG7-32, EZ80