Orange Amp Field Guide: MATAMP ORANGE OR80 prototype??

Orange Matamp OR80 prototype??

Very strange combination of an Orange Matamp OR100 and an Orange OR80



Year: around 1970??
Model:OR80 prototype??
Model Number:OR ST 010
Serial Number:OR ST 010
Config:Head
Control Panel:strange combination!!!
Control Panel Layout:Inputs - Depth - Drive - Bass - Treble - Boost - Volume - Reverb Send - Reverb Return - Pilot Light - Power switch
Rear Panel Layout:Mains plug - Voltage selector - 2 fuse holders - Impedance selector (2 pos) - 2 speakers outputs
Cabinet:size?
Weight:
Speakers/Load: ?? / ??
Speaker model:N/A
Effects:N/A
Output:80 Watts??
Preamp tubes:1.5 x 12AX7 ???
Power tubes:2 x EL34
Bias:Fixed bias
Rectifier:solid state
Phase Inverter:Cathodyne type: 1/2 x 12ax7
Circuit:???
Chassis layout:preamp tubes are chassis mounted
Comments:This seems to be a very early prototype of an OR80