6V6 tube amps use a common market, using the topology (schematic) push pull common as well and are often found on the Internet.
specs:
OT = China
Transformer = American
Transformer Coke = local
Chassis = China
Power tube = 6n6c russia (6V6)
Inverter tube = ecc 81 sylvania black plate
input tube = ecc 83 black plate
Point to point soldering