Finally got one.
Bit more gone on inside than is ideal, clearly burned up at some point, new valve base and lots of new wiring, along with most of a recap. Also, looks a lot like they used lead free solder but not a suitably hot iron, so gonna have to redo all the joints and they look duff and a resistor just pulled off.
A mate just dropped this round for me to look at. Pretty rare, not heard of them before. 200w Supergroup instrument head.
Inside, its runs from 6 EL34, and massive Partridge iron, with the Laney style both at one end thing which makes it a proper pain in the nuts to carry.
Underneath, same style as the Klipps, but bigger:
Big enough the other board needs a separate pic:
Can’t say how it sounds because opening it shows a few of those big caps aren’t actually soldered at the ends, pretty similar to one of the Klipps. supposedly had been serviced too, which appears to have been putting a new valve in and not even dusting it. Going to need a bit of a going over before I’ll be firing it up, lots of power going on.