The BR30 is a valve amp dating from the late 1960s and designed primarily for bass.
It has e x EL84s and not a lot else with just 2 inputs and a volume control, bass selector switch with 3 positions, and a treble control.
Many thanks to Kaveh for permission to use the following pics –
Thanks to Adam Burges in Perth, Australia for the following pics of his BR30 and matching cab :-
I also have pictures of a BR30 with a matching Starfinder cab which can be seen via this link :- BR30 plus cab