I've just won one of these on eBay and was wondering if anyone knew anything about them.  I understand that Custom Sound (in Pudsey in Yorkshire) was taken over by FAL (Futuristic Aids Ltd) but nothing else. 
It is SS with 2 2N3773s in the output and is supposed to be 65watts.  It has a 15" speaker which is like new, but has no markings on it. It has had the back stove in but sounds OK.  No idea when it was made.

Does anyone know anything about these and where I can get a circuit for it, although it probably wouldn't be too difficult to trace it out.

Tony.