Vox AC30CC2. Second hand. Two button footswitch included to actuate the reverb and tremolo.
 
The AC30CC2 utilises two 12" Vox Wharfedale GSH-1230-8 eight ohm speakers, wired in series to sixteen ohms and designed to tonally resemble the famous "green back" speaker frequently used by Vox from the 70s through the 90s.