I just got this tube amplifier from Japan about 3 months ago.
No brand indicated but all transformers made by Ko-On Denpa. (Not sure TKD or not)
It's mono push pull amplifier using 6AU6 - 6AR5 - 807 x2 and 5U4GB - 5Y3 for rectifier.
It has input transformer, output transformer and 2 power transformers
Almost electrolytic capacitor leaked but it's not a problem because I need only chassis.
I plan to build stereo single ended tube amplifier in this chassis.
Let's see what happen next in couple months.