Oh my, this is rare beauty!  V similar to the Supro Thunderbolt, it features a decidedly odd tone stack which only services to accentuate the already uniquely crunchy tones of the circuit.   This amp sounds amazing and looks amazing.  I couldn’t actually positively identitify the 15" speaker , but it looks original or at least period correct.  The back panel was missing so we created a replacement with ply.  Fully serviced, like all our amps, this needs a few valves and caps.   We measure 18.1W undistorted output. Requires a step down transformer to operate at UK voltages, available on request.