Det or LF triode audio amp
output audio triode.
(the two audio transformers give it away).
Very many 2V valves will work, or 3 x 1j29b Russian rod tubes in triodised connection (1.2V NiMH LT), but only connect half the filament or gain is x2 and then too high. Possibly reduce gain with a 4.7 Ohm resistor in each f- lead, or larger if you want to run off 2V lead Acid.
It probably used a tapped -9V GB pack for the two audio valves, at different taps.
It's not that early as it's dynamic not moving iron cone speaker. Likely most sets had SG RF preamp when that was made, so maybe 1931 to 1934. For strong signal areas.
I don't recognise it. It might have been any cycle shop making them. (Currys started as cycle shop charging the 2V LT batteries).