Interesting. Wonder if the wood was removed?
That one on USAudio Mart looks similar to mine with the wood panels, except mine is the 400A @ 200 wpc. Also my power button is an actual small button, not a toggle switch. And mine is a bit cleaner ;-)
And $600. Not bad, but pretty typical of these old Belles amps.
I tried contacting David about more info on mine, but he never responded back. Info on these old Belles amps is hard to come by. Info on the 150’s are easier to find than mine, that is for sure.